build: move plugins directory to src/plugins

We are going to allow including the plugin sources built within the
ModemManager daemon binary; moving the sources within the daemon
sources directory makes it easier.

12 files changed, 3765 insertions, 0 deletions

diff --git a/src/plugins/simtech/77-mm-simtech-port-types.rules b/src/plugins/simtech/77-mm-simtech-port-types.rules
new file mode 100644
index 00000000..e51a60dd
--- /dev/null
+++ b/src/plugins/simtech/77-mm-simtech-port-types.rules
@@ -0,0 +1,59 @@
+# do not edit this file, it will be overwritten on update
+
+# Simtech makes modules that other companies rebrand, like:
+#
+# A-LINK 3GU
+# SCT UM300
+#
+# Most of these values were scraped from various SimTech-based Windows
+# driver .inf files.  *mdm.inf lists the main command ports, while
+# *ser.inf lists the aux ports that may be used for PPP.
+
+
+ACTION!="add|change|move|bind", GOTO="mm_simtech_port_types_end"
+SUBSYSTEMS=="usb", ATTRS{idVendor}=="1e0e", GOTO="mm_simtech_port_types"
+GOTO="mm_simtech_port_types_end"
+
+LABEL="mm_simtech_port_types"
+SUBSYSTEMS=="usb", ATTRS{bInterfaceNumber}=="?*", ENV{.MM_USBIFNUM}="$attr{bInterfaceNumber}"
+
+# A-LINK 3GU
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="cefe", ENV{.MM_USBIFNUM}=="02", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_PRIMARY}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="cefe", ENV{.MM_USBIFNUM}=="00", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_SECONDARY}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="cefe", ENV{.MM_USBIFNUM}=="01", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_SECONDARY}="1"
+
+# Prolink PH-300
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9100", ENV{.MM_USBIFNUM}=="03", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_PRIMARY}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9100", ENV{.MM_USBIFNUM}=="01", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_SECONDARY}="1"
+
+# SCT UM300
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9200", ENV{.MM_USBIFNUM}=="03", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_PRIMARY}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9200", ENV{.MM_USBIFNUM}=="01", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_SECONDARY}="1"
+
+# SIM7000, SIM7100, SIM7600...
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9001", ENV{.MM_USBIFNUM}=="00", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_QCDM}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9001", ENV{.MM_USBIFNUM}=="01", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_GPS}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9001", ENV{.MM_USBIFNUM}=="02", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_PRIMARY}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9001", ENV{.MM_USBIFNUM}=="03", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_SECONDARY}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9001", ENV{.MM_USBIFNUM}=="04", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AUDIO}="1"
+
+# SIM7070, SIM7080, SIM7090 (default layout)...
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9205", ENV{.MM_USBIFNUM}=="00", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_QCDM}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9205", ENV{.MM_USBIFNUM}=="01", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_GPS}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9205", ENV{.MM_USBIFNUM}=="02", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_PRIMARY}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9205", ENV{.MM_USBIFNUM}=="03", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_PPP}="1"
+# Disable CPOL based features
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9205", ENV{ID_MM_PREFERRED_NETWORKS_CPOL_DISABLED}="1"
+
+
+# SIM7070, SIM7080, SIM7090 (secondary layout)...
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9206", ENV{.MM_USBIFNUM}=="00", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_QCDM}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9206", ENV{.MM_USBIFNUM}=="01", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_GPS}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9206", ENV{.MM_USBIFNUM}=="02", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_PRIMARY}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9206", ENV{.MM_USBIFNUM}=="03", ENV{ID_MM_PORT_IGNORE}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9206", ENV{.MM_USBIFNUM}=="04", ENV{ID_MM_PORT_IGNORE}="1"
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9206", ENV{.MM_USBIFNUM}=="05", SUBSYSTEM=="tty", ENV{ID_MM_PORT_TYPE_AT_PPP}="1"
+# Disable CPOL based features
+ATTRS{idVendor}=="1e0e", ATTRS{idProduct}=="9206", ENV{ID_MM_PREFERRED_NETWORKS_CPOL_DISABLED}="1"
+
+LABEL="mm_simtech_port_types_end"
diff --git a/src/plugins/simtech/mm-broadband-modem-qmi-simtech.c b/src/plugins/simtech/mm-broadband-modem-qmi-simtech.c
new file mode 100644
index 00000000..93ff8576
--- /dev/null
+++ b/src/plugins/simtech/mm-broadband-modem-qmi-simtech.c
@@ -0,0 +1,127 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2019 Aleksander Morgado <aleksander@aleksander.es>
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+
+#include "ModemManager.h"
+#include "mm-errors-types.h"
+#include "mm-iface-modem-location.h"
+#include "mm-iface-modem-voice.h"
+#include "mm-broadband-modem-qmi-simtech.h"
+#include "mm-shared-simtech.h"
+
+static void iface_modem_location_init (MMIfaceModemLocation *iface);
+static void iface_modem_voice_init    (MMIfaceModemVoice    *iface);
+static void shared_simtech_init       (MMSharedSimtech      *iface);
+
+static MMIfaceModemLocation *iface_modem_location_parent;
+static MMIfaceModemVoice    *iface_modem_voice_parent;
+
+G_DEFINE_TYPE_EXTENDED (MMBroadbandModemQmiSimtech, mm_broadband_modem_qmi_simtech, MM_TYPE_BROADBAND_MODEM_QMI, 0,
+                        G_IMPLEMENT_INTERFACE (MM_TYPE_IFACE_MODEM_LOCATION, iface_modem_location_init)
+                        G_IMPLEMENT_INTERFACE (MM_TYPE_IFACE_MODEM_VOICE, iface_modem_voice_init)
+                        G_IMPLEMENT_INTERFACE (MM_TYPE_SHARED_SIMTECH, shared_simtech_init))
+
+/*****************************************************************************/
+
+MMBroadbandModemQmiSimtech *
+mm_broadband_modem_qmi_simtech_new (const gchar  *device,
+                                    const gchar **drivers,
+                                    const gchar  *plugin,
+                                    guint16       vendor_id,
+                                    guint16       product_id)
+{
+    return g_object_new (MM_TYPE_BROADBAND_MODEM_QMI_SIMTECH,
+                         MM_BASE_MODEM_DEVICE,     device,
+                         MM_BASE_MODEM_DRIVERS,    drivers,
+                         MM_BASE_MODEM_PLUGIN,     plugin,
+                         MM_BASE_MODEM_VENDOR_ID,  vendor_id,
+                         MM_BASE_MODEM_PRODUCT_ID, product_id,
+                         /* QMI modem supports NET only */
+                         MM_BASE_MODEM_DATA_NET_SUPPORTED, TRUE,
+                         MM_BASE_MODEM_DATA_TTY_SUPPORTED, FALSE,
+                         MM_BROADBAND_MODEM_INDICATORS_DISABLED, TRUE,
+                         MM_IFACE_MODEM_SIM_HOT_SWAP_SUPPORTED, TRUE,
+                         NULL);
+}
+
+static void
+mm_broadband_modem_qmi_simtech_init (MMBroadbandModemQmiSimtech *self)
+{
+}
+
+static void
+iface_modem_location_init (MMIfaceModemLocation *iface)
+{
+    iface_modem_location_parent = g_type_interface_peek_parent (iface);
+
+    iface->load_capabilities                 = mm_shared_simtech_location_load_capabilities;
+    iface->load_capabilities_finish          = mm_shared_simtech_location_load_capabilities_finish;
+    iface->enable_location_gathering         = mm_shared_simtech_enable_location_gathering;
+    iface->enable_location_gathering_finish  = mm_shared_simtech_enable_location_gathering_finish;
+    iface->disable_location_gathering        = mm_shared_simtech_disable_location_gathering;
+    iface->disable_location_gathering_finish = mm_shared_simtech_disable_location_gathering_finish;
+}
+
+static MMIfaceModemLocation *
+peek_parent_location_interface (MMSharedSimtech *self)
+{
+    return iface_modem_location_parent;
+}
+
+static void
+iface_modem_voice_init (MMIfaceModemVoice *iface)
+{
+    iface_modem_voice_parent = g_type_interface_peek_parent (iface);
+
+    iface->check_support                     = mm_shared_simtech_voice_check_support;
+    iface->check_support_finish              = mm_shared_simtech_voice_check_support_finish;
+    iface->enable_unsolicited_events         = mm_shared_simtech_voice_enable_unsolicited_events;
+    iface->enable_unsolicited_events_finish  = mm_shared_simtech_voice_enable_unsolicited_events_finish;
+    iface->disable_unsolicited_events        = mm_shared_simtech_voice_disable_unsolicited_events;
+    iface->disable_unsolicited_events_finish = mm_shared_simtech_voice_disable_unsolicited_events_finish;
+    iface->setup_unsolicited_events          = mm_shared_simtech_voice_setup_unsolicited_events;
+    iface->setup_unsolicited_events_finish   = mm_shared_simtech_voice_setup_unsolicited_events_finish;
+    iface->cleanup_unsolicited_events        = mm_shared_simtech_voice_cleanup_unsolicited_events;
+    iface->cleanup_unsolicited_events_finish = mm_shared_simtech_voice_cleanup_unsolicited_events_finish;
+    iface->setup_in_call_audio_channel          = mm_shared_simtech_voice_setup_in_call_audio_channel;
+    iface->setup_in_call_audio_channel_finish   = mm_shared_simtech_voice_setup_in_call_audio_channel_finish;
+    iface->cleanup_in_call_audio_channel        = mm_shared_simtech_voice_cleanup_in_call_audio_channel;
+    iface->cleanup_in_call_audio_channel_finish = mm_shared_simtech_voice_cleanup_in_call_audio_channel_finish;
+}
+
+static MMIfaceModemVoice *
+peek_parent_voice_interface (MMSharedSimtech *self)
+{
+    return iface_modem_voice_parent;
+}
+
+static void
+shared_simtech_init (MMSharedSimtech *iface)
+{
+    iface->peek_parent_location_interface = peek_parent_location_interface;
+    iface->peek_parent_voice_interface    = peek_parent_voice_interface;
+}
+
+static void
+mm_broadband_modem_qmi_simtech_class_init (MMBroadbandModemQmiSimtechClass *klass)
+{
+}
diff --git a/src/plugins/simtech/mm-broadband-modem-qmi-simtech.h b/src/plugins/simtech/mm-broadband-modem-qmi-simtech.h
new file mode 100644
index 00000000..2f5b819b
--- /dev/null
+++ b/src/plugins/simtech/mm-broadband-modem-qmi-simtech.h
@@ -0,0 +1,47 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2019 Aleksander Morgado <aleksander@aleksander.es>
+ */
+
+#ifndef MM_BROADBAND_MODEM_QMI_SIMTECH_QMI_H
+#define MM_BROADBAND_MODEM_QMI_SIMTECH_QMI_H
+
+#include "mm-broadband-modem-qmi.h"
+
+#define MM_TYPE_BROADBAND_MODEM_QMI_SIMTECH            (mm_broadband_modem_qmi_simtech_get_type ())
+#define MM_BROADBAND_MODEM_QMI_SIMTECH(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), MM_TYPE_BROADBAND_MODEM_QMI_SIMTECH, MMBroadbandModemQmiSimtech))
+#define MM_BROADBAND_MODEM_QMI_SIMTECH_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  MM_TYPE_BROADBAND_MODEM_QMI_SIMTECH, MMBroadbandModemQmiSimtechClass))
+#define MM_IS_BROADBAND_MODEM_QMI_SIMTECH(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), MM_TYPE_BROADBAND_MODEM_QMI_SIMTECH))
+#define MM_IS_BROADBAND_MODEM_QMI_SIMTECH_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  MM_TYPE_BROADBAND_MODEM_QMI_SIMTECH))
+#define MM_BROADBAND_MODEM_QMI_SIMTECH_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  MM_TYPE_BROADBAND_MODEM_QMI_SIMTECH, MMBroadbandModemQmiSimtechClass))
+
+typedef struct _MMBroadbandModemQmiSimtech MMBroadbandModemQmiSimtech;
+typedef struct _MMBroadbandModemQmiSimtechClass MMBroadbandModemQmiSimtechClass;
+
+struct _MMBroadbandModemQmiSimtech {
+    MMBroadbandModemQmi parent;
+};
+
+struct _MMBroadbandModemQmiSimtechClass{
+    MMBroadbandModemQmiClass parent;
+};
+
+GType mm_broadband_modem_qmi_simtech_get_type (void);
+
+MMBroadbandModemQmiSimtech *mm_broadband_modem_qmi_simtech_new (const gchar  *device,
+                                                                const gchar **drivers,
+                                                                const gchar  *plugin,
+                                                                guint16       vendor_id,
+                                                                guint16       product_id);
+
+#endif /* MM_BROADBAND_MODEM_QMI_SIMTECH_H */
diff --git a/src/plugins/simtech/mm-broadband-modem-simtech.c b/src/plugins/simtech/mm-broadband-modem-simtech.c
new file mode 100644
index 00000000..2ca0c6ae
--- /dev/null
+++ b/src/plugins/simtech/mm-broadband-modem-simtech.c
@@ -0,0 +1,1351 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2008 - 2009 Novell, Inc.
+ * Copyright (C) 2009 - 2012 Red Hat, Inc.
+ * Copyright (C) 2012 Aleksander Morgado <aleksander@gnu.org>
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+
+#define _LIBMM_INSIDE_MM
+#include <libmm-glib.h>
+
+#include "ModemManager.h"
+#include "mm-modem-helpers.h"
+#include "mm-log-object.h"
+#include "mm-base-modem-at.h"
+#include "mm-iface-modem.h"
+#include "mm-iface-modem-3gpp.h"
+#include "mm-iface-modem-location.h"
+#include "mm-iface-modem-voice.h"
+#include "mm-shared-simtech.h"
+#include "mm-broadband-modem-simtech.h"
+
+static void iface_modem_init          (MMIfaceModem         *iface);
+static void iface_modem_3gpp_init     (MMIfaceModem3gpp     *iface);
+static void iface_modem_location_init (MMIfaceModemLocation *iface);
+static void iface_modem_voice_init    (MMIfaceModemVoice    *iface);
+static void shared_simtech_init       (MMSharedSimtech      *iface);
+
+static MMIfaceModem         *iface_modem_parent;
+static MMIfaceModem3gpp     *iface_modem_3gpp_parent;
+static MMIfaceModemLocation *iface_modem_location_parent;
+static MMIfaceModemVoice    *iface_modem_voice_parent;
+
+G_DEFINE_TYPE_EXTENDED (MMBroadbandModemSimtech, mm_broadband_modem_simtech, MM_TYPE_BROADBAND_MODEM, 0,
+                        G_IMPLEMENT_INTERFACE (MM_TYPE_IFACE_MODEM, iface_modem_init)
+                        G_IMPLEMENT_INTERFACE (MM_TYPE_IFACE_MODEM_3GPP, iface_modem_3gpp_init)
+                        G_IMPLEMENT_INTERFACE (MM_TYPE_IFACE_MODEM_LOCATION, iface_modem_location_init)
+                        G_IMPLEMENT_INTERFACE (MM_TYPE_IFACE_MODEM_VOICE, iface_modem_voice_init)
+                        G_IMPLEMENT_INTERFACE (MM_TYPE_SHARED_SIMTECH, shared_simtech_init))
+
+typedef enum {
+    FEATURE_SUPPORT_UNKNOWN,
+    FEATURE_NOT_SUPPORTED,
+    FEATURE_SUPPORTED
+} FeatureSupport;
+
+struct _MMBroadbandModemSimtechPrivate {
+    FeatureSupport  cnsmod_support;
+    FeatureSupport  autocsq_support;
+    GRegex         *cnsmod_regex;
+    GRegex         *csq_regex;
+};
+
+/*****************************************************************************/
+/* Setup/Cleanup unsolicited events (3GPP interface) */
+
+static MMModemAccessTechnology
+simtech_act_to_mm_act (guint nsmod)
+{
+    static const MMModemAccessTechnology simtech_act_to_mm_act_map[] = {
+        [0] = MM_MODEM_ACCESS_TECHNOLOGY_UNKNOWN,
+        [1] = MM_MODEM_ACCESS_TECHNOLOGY_GSM,
+        [2] = MM_MODEM_ACCESS_TECHNOLOGY_GPRS,
+        [3] = MM_MODEM_ACCESS_TECHNOLOGY_EDGE,
+        [4] = MM_MODEM_ACCESS_TECHNOLOGY_UMTS,
+        [5] = MM_MODEM_ACCESS_TECHNOLOGY_HSDPA,
+        [6] = MM_MODEM_ACCESS_TECHNOLOGY_HSUPA,
+        [7] = MM_MODEM_ACCESS_TECHNOLOGY_HSPA,
+        [8] = MM_MODEM_ACCESS_TECHNOLOGY_LTE,
+    };
+
+    return (nsmod < G_N_ELEMENTS (simtech_act_to_mm_act_map) ? simtech_act_to_mm_act_map[nsmod] : MM_MODEM_ACCESS_TECHNOLOGY_UNKNOWN);
+}
+
+static void
+simtech_tech_changed (MMPortSerialAt *port,
+                      GMatchInfo *match_info,
+                      MMBroadbandModemSimtech *self)
+{
+    guint simtech_act = 0;
+
+    if (!mm_get_uint_from_match_info (match_info, 1, &simtech_act))
+        return;
+
+    mm_iface_modem_update_access_technologies (
+        MM_IFACE_MODEM (self),
+        simtech_act_to_mm_act (simtech_act),
+        MM_IFACE_MODEM_3GPP_ALL_ACCESS_TECHNOLOGIES_MASK);
+}
+
+static void
+simtech_signal_changed (MMPortSerialAt *port,
+                        GMatchInfo *match_info,
+                        MMBroadbandModemSimtech *self)
+{
+    guint quality = 0;
+
+    if (!mm_get_uint_from_match_info (match_info, 1, &quality))
+        return;
+
+    if (quality != 99)
+        quality = MM_CLAMP_HIGH (quality, 31) * 100 / 31;
+    else
+        quality = 0;
+
+    mm_iface_modem_update_signal_quality (MM_IFACE_MODEM (self), quality);
+}
+
+static void
+set_unsolicited_events_handlers (MMBroadbandModemSimtech *self,
+                                 gboolean enable)
+{
+    MMPortSerialAt *ports[2];
+    guint i;
+
+    ports[0] = mm_base_modem_peek_port_primary (MM_BASE_MODEM (self));
+    ports[1] = mm_base_modem_peek_port_secondary (MM_BASE_MODEM (self));
+
+    /* Enable unsolicited events in given port */
+    for (i = 0; i < G_N_ELEMENTS (ports); i++) {
+        if (!ports[i])
+            continue;
+
+        /* Access technology related */
+        mm_port_serial_at_add_unsolicited_msg_handler (
+            ports[i],
+            self->priv->cnsmod_regex,
+            enable ? (MMPortSerialAtUnsolicitedMsgFn)simtech_tech_changed : NULL,
+            enable ? self : NULL,
+            NULL);
+
+        /* Signal quality related */
+        mm_port_serial_at_add_unsolicited_msg_handler (
+            ports[i],
+            self->priv->csq_regex,
+            enable ? (MMPortSerialAtUnsolicitedMsgFn)simtech_signal_changed : NULL,
+            enable ? self : NULL,
+            NULL);
+    }
+}
+
+static gboolean
+modem_3gpp_setup_cleanup_unsolicited_events_finish (MMIfaceModem3gpp  *self,
+                                                    GAsyncResult      *res,
+                                                    GError           **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+parent_setup_unsolicited_events_ready (MMIfaceModem3gpp *self,
+                                       GAsyncResult     *res,
+                                       GTask            *task)
+{
+    GError *error = NULL;
+
+    if (!iface_modem_3gpp_parent->setup_unsolicited_events_finish (self, res, &error))
+        g_task_return_error (task, error);
+    else {
+        /* Our own setup now */
+        set_unsolicited_events_handlers (MM_BROADBAND_MODEM_SIMTECH (self), TRUE);
+        g_task_return_boolean (task, TRUE);
+    }
+    g_object_unref (task);
+}
+
+static void
+modem_3gpp_setup_unsolicited_events (MMIfaceModem3gpp *self,
+                                     GAsyncReadyCallback callback,
+                                     gpointer user_data)
+{
+    /* Chain up parent's setup */
+    iface_modem_3gpp_parent->setup_unsolicited_events (
+        self,
+        (GAsyncReadyCallback)parent_setup_unsolicited_events_ready,
+        g_task_new (self, NULL, callback, user_data));
+}
+
+static void
+parent_cleanup_unsolicited_events_ready (MMIfaceModem3gpp *self,
+                                         GAsyncResult     *res,
+                                         GTask            *task)
+{
+    GError *error = NULL;
+
+    if (!iface_modem_3gpp_parent->cleanup_unsolicited_events_finish (self, res, &error))
+        g_task_return_error (task, error);
+    else
+        g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+static void
+modem_3gpp_cleanup_unsolicited_events (MMIfaceModem3gpp    *self,
+                                       GAsyncReadyCallback  callback,
+                                       gpointer             user_data)
+{
+    /* Our own cleanup first */
+    set_unsolicited_events_handlers (MM_BROADBAND_MODEM_SIMTECH (self), FALSE);
+
+    /* And now chain up parent's cleanup */
+    iface_modem_3gpp_parent->cleanup_unsolicited_events (
+        self,
+        (GAsyncReadyCallback)parent_cleanup_unsolicited_events_ready,
+        g_task_new (self, NULL, callback, user_data));
+}
+
+/*****************************************************************************/
+/* Enable unsolicited events (3GPP interface) */
+
+typedef enum {
+    ENABLE_UNSOLICITED_EVENTS_STEP_FIRST,
+    ENABLE_UNSOLICITED_EVENTS_STEP_PARENT,
+    ENABLE_UNSOLICITED_EVENTS_STEP_CHECK_SUPPORT_CNSMOD,
+    ENABLE_UNSOLICITED_EVENTS_STEP_ENABLE_CNSMOD,
+    ENABLE_UNSOLICITED_EVENTS_STEP_CHECK_SUPPORT_AUTOCSQ,
+    ENABLE_UNSOLICITED_EVENTS_STEP_ENABLE_AUTOCSQ,
+    ENABLE_UNSOLICITED_EVENTS_STEP_LAST,
+} EnableUnsolicitedEventsStep;
+
+typedef struct {
+    EnableUnsolicitedEventsStep step;
+} EnableUnsolicitedEventsContext;
+
+static gboolean
+modem_3gpp_enable_unsolicited_events_finish (MMIfaceModem3gpp  *self,
+                                             GAsyncResult      *res,
+                                             GError           **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void enable_unsolicited_events_context_step (GTask *task);
+
+static void
+autocsq_set_enabled_ready (MMBaseModem  *self,
+                           GAsyncResult *res,
+                           GTask        *task)
+{
+    EnableUnsolicitedEventsContext *ctx;
+    GError                         *error = NULL;
+    gboolean                        csq_urcs_enabled = FALSE;
+
+    ctx = g_task_get_task_data (task);
+
+    if (!mm_base_modem_at_command_finish (self, res, &error)) {
+        mm_obj_dbg (self, "couldn't enable automatic signal quality reporting: %s", error->message);
+        g_error_free (error);
+    } else
+        csq_urcs_enabled = TRUE;
+
+    /* Disable access technology polling if we can use the +CSQ URCs */
+    g_object_set (self,
+                  MM_IFACE_MODEM_PERIODIC_SIGNAL_CHECK_DISABLED, csq_urcs_enabled,
+                  NULL);
+
+    /* go to next step */
+    ctx->step++;
+    enable_unsolicited_events_context_step (task);
+}
+
+static void
+autocsq_test_ready (MMBaseModem  *_self,
+                    GAsyncResult *res,
+                    GTask        *task)
+{
+    MMBroadbandModemSimtech        *self;
+    EnableUnsolicitedEventsContext *ctx;
+
+    self = MM_BROADBAND_MODEM_SIMTECH (_self);
+    ctx  = g_task_get_task_data (task);
+
+    if (!mm_base_modem_at_command_finish (_self, res, NULL))
+        self->priv->autocsq_support = FEATURE_NOT_SUPPORTED;
+    else
+        self->priv->autocsq_support = FEATURE_SUPPORTED;
+
+    /* go to next step */
+    ctx->step++;
+    enable_unsolicited_events_context_step (task);
+}
+
+static void
+cnsmod_set_enabled_ready (MMBaseModem  *self,
+                          GAsyncResult *res,
+                          GTask        *task)
+{
+    EnableUnsolicitedEventsContext *ctx;
+    GError                         *error = NULL;
+    gboolean                        cnsmod_urcs_enabled = FALSE;
+
+    ctx = g_task_get_task_data (task);
+
+    if (!mm_base_modem_at_command_finish (self, res, &error)) {
+        mm_obj_dbg (self, "couldn't enable automatic access technology reporting: %s", error->message);
+        g_error_free (error);
+    } else
+        cnsmod_urcs_enabled = TRUE;
+
+    /* Disable access technology polling if we can use the +CNSMOD URCs */
+    g_object_set (self,
+                  MM_IFACE_MODEM_PERIODIC_ACCESS_TECH_CHECK_DISABLED, cnsmod_urcs_enabled,
+                  NULL);
+
+    /* go to next step */
+    ctx->step++;
+    enable_unsolicited_events_context_step (task);
+}
+
+static void
+cnsmod_test_ready (MMBaseModem  *_self,
+                   GAsyncResult *res,
+                   GTask        *task)
+{
+    MMBroadbandModemSimtech        *self;
+    EnableUnsolicitedEventsContext *ctx;
+
+    self = MM_BROADBAND_MODEM_SIMTECH (_self);
+    ctx  = g_task_get_task_data (task);
+
+    if (!mm_base_modem_at_command_finish (_self, res, NULL))
+        self->priv->cnsmod_support = FEATURE_NOT_SUPPORTED;
+    else
+        self->priv->cnsmod_support = FEATURE_SUPPORTED;
+
+    /* go to next step */
+    ctx->step++;
+    enable_unsolicited_events_context_step (task);
+}
+
+static void
+parent_enable_unsolicited_events_ready (MMIfaceModem3gpp *self,
+                                        GAsyncResult     *res,
+                                        GTask            *task)
+{
+    EnableUnsolicitedEventsContext *ctx;
+    GError                         *error = NULL;
+
+    ctx = g_task_get_task_data (task);
+
+    if (!iface_modem_3gpp_parent->enable_unsolicited_events_finish (self, res, &error)) {
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
+    }
+
+    /* go to next step */
+    ctx->step++;
+    enable_unsolicited_events_context_step (task);
+}
+
+static void
+enable_unsolicited_events_context_step (GTask *task)
+{
+    MMBroadbandModemSimtech        *self;
+    EnableUnsolicitedEventsContext *ctx;
+
+    self = g_task_get_source_object (task);
+    ctx  = g_task_get_task_data (task);
+
+    switch (ctx->step) {
+    case ENABLE_UNSOLICITED_EVENTS_STEP_FIRST:
+        ctx->step++;
+        /* fall through */
+
+    case ENABLE_UNSOLICITED_EVENTS_STEP_PARENT:
+        iface_modem_3gpp_parent->enable_unsolicited_events (
+            MM_IFACE_MODEM_3GPP (self),
+            (GAsyncReadyCallback)parent_enable_unsolicited_events_ready,
+            task);
+        return;
+
+    case ENABLE_UNSOLICITED_EVENTS_STEP_CHECK_SUPPORT_CNSMOD:
+        if (self->priv->cnsmod_support == FEATURE_SUPPORT_UNKNOWN) {
+            mm_base_modem_at_command (MM_BASE_MODEM (self),
+                                      "+CNSMOD=?",
+                                      3,
+                                      TRUE,
+                                      (GAsyncReadyCallback)cnsmod_test_ready,
+                                      task);
+            return;
+        }
+        ctx->step++;
+        /* fall through */
+
+    case ENABLE_UNSOLICITED_EVENTS_STEP_ENABLE_CNSMOD:
+        if (self->priv->cnsmod_support == FEATURE_SUPPORTED) {
+            mm_base_modem_at_command (MM_BASE_MODEM (self),
+                                      /* Autoreport +CNSMOD when it changes */
+                                      "+CNSMOD=1",
+                                      20,
+                                      FALSE,
+                                      (GAsyncReadyCallback)cnsmod_set_enabled_ready,
+                                      task);
+            return;
+        }
+        ctx->step++;
+        /* fall through */
+
+    case ENABLE_UNSOLICITED_EVENTS_STEP_CHECK_SUPPORT_AUTOCSQ:
+        if (self->priv->autocsq_support == FEATURE_SUPPORT_UNKNOWN) {
+            mm_base_modem_at_command (MM_BASE_MODEM (self),
+                                      "+AUTOCSQ=?",
+                                      3,
+                                      TRUE,
+                                      (GAsyncReadyCallback)autocsq_test_ready,
+                                      task);
+            return;
+        }
+        ctx->step++;
+        /* fall through */
+
+    case ENABLE_UNSOLICITED_EVENTS_STEP_ENABLE_AUTOCSQ:
+        if (self->priv->autocsq_support == FEATURE_SUPPORTED) {
+            mm_base_modem_at_command (MM_BASE_MODEM (self),
+                                      /* Autoreport+ CSQ (first arg), and only report when it changes (second arg) */
+                                      "+AUTOCSQ=1,1",
+                                      20,
+                                      FALSE,
+                                      (GAsyncReadyCallback)autocsq_set_enabled_ready,
+                                      task);
+            return;
+        }
+        ctx->step++;
+        /* fall through */
+
+    case ENABLE_UNSOLICITED_EVENTS_STEP_LAST:
+        g_task_return_boolean (task, TRUE);
+        g_object_unref (task);
+        return;
+
+    default:
+        g_assert_not_reached ();
+    }
+}
+
+static void
+modem_3gpp_enable_unsolicited_events (MMIfaceModem3gpp    *self,
+                                      GAsyncReadyCallback  callback,
+                                      gpointer             user_data)
+{
+    EnableUnsolicitedEventsContext *ctx;
+    GTask                          *task;
+
+    task = g_task_new (self, NULL, callback, user_data);
+
+    ctx = g_new (EnableUnsolicitedEventsContext, 1);
+    ctx->step = ENABLE_UNSOLICITED_EVENTS_STEP_FIRST;
+    g_task_set_task_data (task, ctx, g_free);
+
+    enable_unsolicited_events_context_step (task);
+}
+
+/*****************************************************************************/
+/* Disable unsolicited events (3GPP interface) */
+
+typedef enum {
+    DISABLE_UNSOLICITED_EVENTS_STEP_FIRST,
+    DISABLE_UNSOLICITED_EVENTS_STEP_DISABLE_AUTOCSQ,
+    DISABLE_UNSOLICITED_EVENTS_STEP_DISABLE_CNSMOD,
+    DISABLE_UNSOLICITED_EVENTS_STEP_PARENT,
+    DISABLE_UNSOLICITED_EVENTS_STEP_LAST,
+} DisableUnsolicitedEventsStep;
+
+typedef struct {
+    DisableUnsolicitedEventsStep step;
+} DisableUnsolicitedEventsContext;
+
+static gboolean
+modem_3gpp_disable_unsolicited_events_finish (MMIfaceModem3gpp  *self,
+                                              GAsyncResult      *res,
+                                              GError           **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void disable_unsolicited_events_context_step (GTask *task);
+
+static void
+parent_disable_unsolicited_events_ready (MMIfaceModem3gpp *self,
+                                         GAsyncResult     *res,
+                                         GTask            *task)
+{
+    DisableUnsolicitedEventsContext *ctx;
+    GError                         *error = NULL;
+
+    ctx = g_task_get_task_data (task);
+
+    if (!iface_modem_3gpp_parent->disable_unsolicited_events_finish (self, res, &error)) {
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
+    }
+
+    /* go to next step */
+    ctx->step++;
+    disable_unsolicited_events_context_step (task);
+}
+
+static void
+cnsmod_set_disabled_ready (MMBaseModem  *self,
+                           GAsyncResult *res,
+                           GTask        *task)
+{
+    DisableUnsolicitedEventsContext *ctx;
+    GError                          *error = NULL;
+
+    ctx = g_task_get_task_data (task);
+
+    if (!mm_base_modem_at_command_finish (self, res, &error)) {
+        mm_obj_dbg (self, "couldn't disable automatic access technology reporting: %s", error->message);
+        g_error_free (error);
+    }
+
+    /* go to next step */
+    ctx->step++;
+    disable_unsolicited_events_context_step (task);
+}
+
+static void
+autocsq_set_disabled_ready (MMBaseModem  *self,
+                            GAsyncResult *res,
+                            GTask        *task)
+{
+    DisableUnsolicitedEventsContext *ctx;
+    GError                          *error = NULL;
+
+    ctx = g_task_get_task_data (task);
+
+    if (!mm_base_modem_at_command_finish (self, res, &error)) {
+        mm_obj_dbg (self, "couldn't disable automatic signal quality reporting: %s", error->message);
+        g_error_free (error);
+    }
+
+    /* go to next step */
+    ctx->step++;
+    disable_unsolicited_events_context_step (task);
+}
+
+static void
+disable_unsolicited_events_context_step (GTask *task)
+{
+    MMBroadbandModemSimtech         *self;
+    DisableUnsolicitedEventsContext *ctx;
+
+    self = g_task_get_source_object (task);
+    ctx  = g_task_get_task_data (task);
+
+    switch (ctx->step) {
+    case DISABLE_UNSOLICITED_EVENTS_STEP_FIRST:
+        ctx->step++;
+        /* fall through */
+
+    case DISABLE_UNSOLICITED_EVENTS_STEP_DISABLE_AUTOCSQ:
+        if (self->priv->autocsq_support == FEATURE_SUPPORTED) {
+            mm_base_modem_at_command (MM_BASE_MODEM (self),
+                                      "+AUTOCSQ=0",
+                                      20,
+                                      FALSE,
+                                      (GAsyncReadyCallback)autocsq_set_disabled_ready,
+                                      task);
+            return;
+        }
+        ctx->step++;
+        /* fall through */
+
+    case DISABLE_UNSOLICITED_EVENTS_STEP_DISABLE_CNSMOD:
+        if (self->priv->cnsmod_support == FEATURE_SUPPORTED) {
+            mm_base_modem_at_command (MM_BASE_MODEM (self),
+                                      "+CNSMOD=0",
+                                      20,
+                                      FALSE,
+                                      (GAsyncReadyCallback)cnsmod_set_disabled_ready,
+                                      task);
+            return;
+        }
+        ctx->step++;
+        /* fall through */
+
+    case DISABLE_UNSOLICITED_EVENTS_STEP_PARENT:
+        iface_modem_3gpp_parent->disable_unsolicited_events (
+            MM_IFACE_MODEM_3GPP (self),
+            (GAsyncReadyCallback)parent_disable_unsolicited_events_ready,
+            task);
+        return;
+
+    case DISABLE_UNSOLICITED_EVENTS_STEP_LAST:
+        g_task_return_boolean (task, TRUE);
+        g_object_unref (task);
+        return;
+
+    default:
+        g_assert_not_reached ();
+    }
+}
+
+static void
+modem_3gpp_disable_unsolicited_events (MMIfaceModem3gpp    *self,
+                                      GAsyncReadyCallback  callback,
+                                      gpointer             user_data)
+{
+    DisableUnsolicitedEventsContext *ctx;
+    GTask                          *task;
+
+    task = g_task_new (self, NULL, callback, user_data);
+
+    ctx = g_new (DisableUnsolicitedEventsContext, 1);
+    ctx->step = DISABLE_UNSOLICITED_EVENTS_STEP_FIRST;
+    g_task_set_task_data (task, ctx, g_free);
+
+    disable_unsolicited_events_context_step (task);
+}
+
+/*****************************************************************************/
+/* Load access technologies (Modem interface) */
+
+static gboolean
+load_access_technologies_finish (MMIfaceModem             *self,
+                                 GAsyncResult             *res,
+                                 MMModemAccessTechnology  *access_technologies,
+                                 guint                    *mask,
+                                 GError                  **error)
+{
+    GError *inner_error = NULL;
+    gssize  act;
+
+    act = g_task_propagate_int (G_TASK (res), &inner_error);
+    if (inner_error) {
+        g_propagate_error (error, inner_error);
+        return FALSE;
+    }
+
+    *access_technologies = (MMModemAccessTechnology) act;
+    *mask = MM_MODEM_ACCESS_TECHNOLOGY_ANY;
+    return TRUE;
+}
+
+static void
+cnsmod_query_ready (MMBaseModem  *self,
+                    GAsyncResult *res,
+                    GTask        *task)
+{
+    const gchar *response, *p;
+    GError      *error = NULL;
+
+    response = mm_base_modem_at_command_finish (MM_BASE_MODEM (self), res, &error);
+    if (!response) {
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
+    }
+
+    p = mm_strip_tag (response, "+CNSMOD:");
+    if (p)
+        p = strchr (p, ',');
+
+    if (!p || !isdigit (*(p + 1)))
+        g_task_return_new_error (
+            task,
+            MM_CORE_ERROR,
+            MM_CORE_ERROR_FAILED,
+            "Failed to parse the +CNSMOD response: '%s'",
+            response);
+    else
+        g_task_return_int (task, simtech_act_to_mm_act (atoi (p + 1)));
+    g_object_unref (task);
+}
+
+static void
+load_access_technologies (MMIfaceModem        *_self,
+                          GAsyncReadyCallback  callback,
+                          gpointer             user_data)
+{
+    MMBroadbandModemSimtech *self;
+    GTask                   *task;
+
+    self = MM_BROADBAND_MODEM_SIMTECH (_self);
+    task = g_task_new (self, NULL, callback, user_data);
+
+    /* Launch query only for 3GPP modems */
+    if (!mm_iface_modem_is_3gpp (_self)) {
+        g_task_return_int (task, MM_MODEM_ACCESS_TECHNOLOGY_UNKNOWN);
+        g_object_unref (task);
+        return;
+    }
+
+    g_assert (self->priv->cnsmod_support != FEATURE_SUPPORT_UNKNOWN);
+    if (self->priv->cnsmod_support == FEATURE_NOT_SUPPORTED) {
+        g_task_return_new_error (task, MM_CORE_ERROR, MM_CORE_ERROR_UNSUPPORTED,
+                                 "Loading access technologies with +CNSMOD is not supported");
+        g_object_unref (task);
+        return;
+    }
+
+    mm_base_modem_at_command (
+        MM_BASE_MODEM (self),
+        "AT+CNSMOD?",
+        3,
+        FALSE,
+        (GAsyncReadyCallback)cnsmod_query_ready,
+        task);
+}
+
+/*****************************************************************************/
+/* Load signal quality (Modem interface) */
+
+static guint
+load_signal_quality_finish (MMIfaceModem  *self,
+                            GAsyncResult  *res,
+                            GError       **error)
+{
+    gssize value;
+
+    value = g_task_propagate_int (G_TASK (res), error);
+    return value < 0 ? 0 : value;
+}
+
+static void
+csq_query_ready (MMBaseModem  *self,
+                 GAsyncResult *res,
+                 GTask        *task)
+{
+    const gchar *response, *p;
+    GError      *error = NULL;
+    gint         quality;
+    gint         ber;
+
+    response = mm_base_modem_at_command_finish (MM_BASE_MODEM (self), res, &error);
+    if (!response) {
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
+    }
+
+    /* Given that we may have enabled AUTOCSQ support, it is totally possible
+     * to get an empty string at this point, because the +CSQ reply may have
+     * been processed as an URC already. If we ever see this, we should not return
+     * an error, because that would reset the reported signal quality to 0 :/
+     * So, in this case, return the last cached signal quality value. */
+    if (!response[0]) {
+        g_task_return_new_error (task, MM_CORE_ERROR, MM_CORE_ERROR_IN_PROGRESS,
+                                 "already refreshed via URCs");
+        g_object_unref (task);
+        return;
+    }
+
+    p = mm_strip_tag (response, "+CSQ:");
+    if (sscanf (p, "%d, %d", &quality, &ber)) {
+        if (quality != 99)
+            quality = CLAMP (quality, 0, 31) * 100 / 31;
+        else
+            quality = 0;
+        g_task_return_int (task, quality);
+        g_object_unref (task);
+        return;
+    }
+
+    g_task_return_new_error (task,
+                             MM_CORE_ERROR,
+                             MM_CORE_ERROR_FAILED,
+                             "Could not parse signal quality results");
+    g_object_unref (task);
+}
+
+static void
+load_signal_quality (MMIfaceModem        *self,
+                     GAsyncReadyCallback  callback,
+                     gpointer             user_data)
+{
+    GTask *task;
+
+    task = g_task_new (self, NULL, callback, user_data);
+
+    mm_base_modem_at_command (
+        MM_BASE_MODEM (self),
+        "+CSQ",
+        3,
+        FALSE,
+        (GAsyncReadyCallback)csq_query_ready,
+        task);
+}
+
+/*****************************************************************************/
+/* Load supported modes (Modem interface) */
+
+static GArray *
+load_supported_modes_finish (MMIfaceModem  *self,
+                             GAsyncResult  *res,
+                             GError       **error)
+{
+    return g_task_propagate_pointer (G_TASK (res), error);
+}
+
+static void
+parent_load_supported_modes_ready (MMIfaceModem *self,
+                                   GAsyncResult *res,
+                                   GTask        *task)
+{
+    GError                 *error = NULL;
+    GArray                 *all;
+    GArray                 *combinations;
+    GArray                 *filtered;
+    MMModemModeCombination  mode;
+
+    all = iface_modem_parent->load_supported_modes_finish (self, res, &error);
+    if (!all) {
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
+    }
+
+    /* Build list of combinations */
+    combinations = g_array_sized_new (FALSE, FALSE, sizeof (MMModemModeCombination), 5);
+    /* 2G only */
+    mode.allowed = MM_MODEM_MODE_2G;
+    mode.preferred = MM_MODEM_MODE_NONE;
+    g_array_append_val (combinations, mode);
+    /* 3G only */
+    mode.allowed = MM_MODEM_MODE_3G;
+    mode.preferred = MM_MODEM_MODE_NONE;
+    g_array_append_val (combinations, mode);
+    /* 2G and 3G */
+    mode.allowed = (MM_MODEM_MODE_2G | MM_MODEM_MODE_3G);
+    mode.preferred = MM_MODEM_MODE_NONE;
+    g_array_append_val (combinations, mode);
+    /* 2G and 3G, 2G preferred */
+    mode.allowed = (MM_MODEM_MODE_2G | MM_MODEM_MODE_3G);
+    mode.preferred = MM_MODEM_MODE_2G;
+    g_array_append_val (combinations, mode);
+    /* 2G and 3G, 3G preferred */
+    mode.allowed = (MM_MODEM_MODE_2G | MM_MODEM_MODE_3G);
+    mode.preferred = MM_MODEM_MODE_3G;
+    g_array_append_val (combinations, mode);
+
+    /* Filter out those unsupported modes */
+    filtered = mm_filter_supported_modes (all, combinations, self);
+    g_array_unref (all);
+    g_array_unref (combinations);
+
+    g_task_return_pointer (task, filtered, (GDestroyNotify) g_array_unref);
+    g_object_unref (task);
+}
+
+static void
+load_supported_modes (MMIfaceModem        *self,
+                      GAsyncReadyCallback  callback,
+                      gpointer             user_data)
+{
+    /* Run parent's loading */
+    iface_modem_parent->load_supported_modes (
+        MM_IFACE_MODEM (self),
+        (GAsyncReadyCallback)parent_load_supported_modes_ready,
+        g_task_new (self, NULL, callback, user_data));
+}
+
+/*****************************************************************************/
+/* Load initial allowed/preferred modes (Modem interface) */
+
+typedef struct {
+    MMModemMode allowed;
+    MMModemMode preferred;
+} LoadCurrentModesResult;
+
+typedef struct {
+    gint acqord;
+    gint modepref;
+} LoadCurrentModesContext;
+
+static gboolean
+load_current_modes_finish (MMIfaceModem  *self,
+                           GAsyncResult  *res,
+                           MMModemMode   *allowed,
+                           MMModemMode   *preferred,
+                           GError       **error)
+{
+    LoadCurrentModesResult *result;
+
+    result = g_task_propagate_pointer (G_TASK (res), error);
+    if (!result)
+        return FALSE;
+
+    *allowed   = result->allowed;
+    *preferred = result->preferred;
+    g_free (result);
+    return TRUE;
+}
+
+static void
+cnmp_query_ready (MMBroadbandModemSimtech *self,
+                  GAsyncResult            *res,
+                  GTask                   *task)
+{
+    LoadCurrentModesContext *ctx;
+    LoadCurrentModesResult  *result;
+    const gchar             *response, *p;
+    GError                  *error = NULL;
+
+    response = mm_base_modem_at_command_finish (MM_BASE_MODEM (self), res, &error);
+    if (!response) {
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
+    }
+
+    ctx = g_task_get_task_data (task);
+
+    p = mm_strip_tag (response, "+CNMP:");
+    if (!p) {
+        g_task_return_new_error (task,
+                                 MM_CORE_ERROR,
+                                 MM_CORE_ERROR_FAILED,
+                                 "Failed to parse the mode preference response: '%s'",
+                                 response);
+        g_object_unref (task);
+        return;
+    }
+
+    result = g_new (LoadCurrentModesResult, 1);
+    result->allowed   = MM_MODEM_MODE_NONE;
+    result->preferred = MM_MODEM_MODE_NONE;
+
+    ctx->modepref = atoi (p);
+    switch (ctx->modepref) {
+    case 2:
+        /* Automatic */
+        switch (ctx->acqord) {
+        case 0:
+            result->allowed = MM_MODEM_MODE_ANY;
+            result->preferred = MM_MODEM_MODE_NONE;
+            break;
+        case 1:
+            result->allowed = (MM_MODEM_MODE_2G | MM_MODEM_MODE_3G);
+            result->preferred = MM_MODEM_MODE_2G;
+            break;
+        case 2:
+            result->allowed = (MM_MODEM_MODE_2G | MM_MODEM_MODE_3G);
+            result->preferred = MM_MODEM_MODE_3G;
+            break;
+        default:
+            g_task_return_new_error (
+                task,
+                MM_CORE_ERROR,
+                MM_CORE_ERROR_FAILED,
+                "Unknown acquisition order preference: '%d'",
+                ctx->acqord);
+            g_object_unref (task);
+            g_free (result);
+            return;
+        }
+        break;
+
+    case 13:
+        /* GSM only */
+        result->allowed = MM_MODEM_MODE_2G;
+        result->preferred = MM_MODEM_MODE_NONE;
+        break;
+
+    case 14:
+        /* WCDMA only */
+        result->allowed = MM_MODEM_MODE_3G;
+        result->preferred = MM_MODEM_MODE_NONE;
+        break;
+
+    default:
+        g_task_return_new_error (
+            task,
+            MM_CORE_ERROR,
+            MM_CORE_ERROR_FAILED,
+            "Unknown mode preference: '%d'",
+            ctx->modepref);
+        g_object_unref (task);
+        g_free (result);
+        return;
+    }
+
+    g_task_return_pointer (task, result, g_free);
+    g_object_unref (task);
+}
+
+static void
+cnaop_query_ready (MMBaseModem  *self,
+                   GAsyncResult *res,
+                   GTask        *task)
+{
+    LoadCurrentModesContext *ctx;
+    const gchar             *response, *p;
+    GError                  *error = NULL;
+
+    response = mm_base_modem_at_command_finish (self, res, &error);
+    if (!response) {
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
+    }
+
+    ctx = g_task_get_task_data (task);
+
+    p = mm_strip_tag (response, "+CNAOP:");
+    if (p)
+        ctx->acqord = atoi (p);
+
+    if (ctx->acqord < 0 || ctx->acqord > 2) {
+        g_task_return_new_error (
+            task,
+            MM_CORE_ERROR,
+            MM_CORE_ERROR_FAILED,
+            "Failed to parse the acquisition order response: '%s'",
+            response);
+        g_object_unref (task);
+        return;
+    }
+
+    mm_base_modem_at_command (
+        MM_BASE_MODEM (self),
+        "+CNMP?",
+        3,
+        FALSE,
+        (GAsyncReadyCallback)cnmp_query_ready,
+        task);
+}
+
+static void
+load_current_modes (MMIfaceModem        *self,
+                    GAsyncReadyCallback  callback,
+                    gpointer             user_data)
+{
+    GTask                   *task;
+    LoadCurrentModesContext *ctx;
+
+    ctx = g_new (LoadCurrentModesContext, 1);
+    ctx->acqord   = -1;
+    ctx->modepref = -1;
+
+    task = g_task_new (self, NULL, callback, user_data);
+    g_task_set_task_data (task, ctx, g_free);
+
+    mm_base_modem_at_command (
+        MM_BASE_MODEM (self),
+        "+CNAOP?",
+        3,
+        FALSE,
+        (GAsyncReadyCallback)cnaop_query_ready,
+        task);
+}
+
+/*****************************************************************************/
+/* Set allowed modes (Modem interface) */
+
+typedef struct {
+    guint nmp;   /* mode preference */
+    guint naop;  /* acquisition order */
+} SetCurrentModesContext;
+
+static gboolean
+set_current_modes_finish (MMIfaceModem  *self,
+                          GAsyncResult  *res,
+                          GError       **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+cnaop_set_ready (MMBaseModem  *self,
+                 GAsyncResult *res,
+                 GTask        *task)
+{
+    GError *error = NULL;
+
+    mm_base_modem_at_command_finish (MM_BASE_MODEM (self), res, &error);
+    if (error)
+        g_task_return_error (task, error);
+    else
+        g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+static void
+cnmp_set_ready (MMBaseModem  *self,
+                GAsyncResult *res,
+                GTask        *task)
+{
+    SetCurrentModesContext *ctx;
+    GError                 *error = NULL;
+    gchar                  *command;
+
+    ctx = g_task_get_task_data (task);
+
+    mm_base_modem_at_command_finish (MM_BASE_MODEM (self), res, &error);
+    if (error) {
+        /* Let the error be critical. */
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
+    }
+
+    command = g_strdup_printf ("+CNAOP=%u", ctx->naop);
+    mm_base_modem_at_command (
+        MM_BASE_MODEM (self),
+        command,
+        3,
+        FALSE,
+        (GAsyncReadyCallback)cnaop_set_ready,
+        task);
+    g_free (command);
+}
+
+static void
+set_current_modes (MMIfaceModem        *self,
+                   MMModemMode          allowed,
+                   MMModemMode          preferred,
+                   GAsyncReadyCallback  callback,
+                   gpointer             user_data)
+{
+    GTask                  *task;
+    SetCurrentModesContext *ctx;
+    gchar                  *command;
+
+    /* Defaults: automatic search */
+    ctx = g_new (SetCurrentModesContext, 1);
+    ctx->nmp  = 2;
+    ctx->naop = 0;
+
+    task = g_task_new (self, NULL, callback, user_data);
+    g_task_set_task_data (task, ctx, g_free);
+
+    if (allowed == MM_MODEM_MODE_ANY && preferred == MM_MODEM_MODE_NONE) {
+        /* defaults nmp and naop */
+    } else if (allowed == MM_MODEM_MODE_2G) {
+        ctx->nmp = 13;
+        ctx->naop = 0;
+    } else if (allowed == MM_MODEM_MODE_3G) {
+        ctx->nmp = 14;
+        ctx->naop = 0;
+    } else if (allowed == (MM_MODEM_MODE_2G | MM_MODEM_MODE_3G)) {
+        /* default nmp */
+        if (preferred == MM_MODEM_MODE_2G)
+            ctx->naop = 3;
+        else if (preferred == MM_MODEM_MODE_3G)
+            ctx->naop = 2;
+        else
+            /* default naop */
+            ctx->naop = 0;
+    } else {
+        gchar *allowed_str;
+        gchar *preferred_str;
+
+        allowed_str = mm_modem_mode_build_string_from_mask (allowed);
+        preferred_str = mm_modem_mode_build_string_from_mask (preferred);
+        g_task_return_new_error (task,
+                                 MM_CORE_ERROR,
+                                 MM_CORE_ERROR_FAILED,
+                                 "Requested mode (allowed: '%s', preferred: '%s') not "
+                                 "supported by the modem.",
+                                 allowed_str,
+                                 preferred_str);
+        g_object_unref (task);
+        g_free (allowed_str);
+        g_free (preferred_str);
+        return;
+    }
+
+    command = g_strdup_printf ("+CNMP=%u", ctx->nmp);
+    mm_base_modem_at_command (
+        MM_BASE_MODEM (self),
+        command,
+        3,
+        FALSE,
+        (GAsyncReadyCallback)cnmp_set_ready,
+        task);
+    g_free (command);
+}
+
+/*****************************************************************************/
+/* Setup ports (Broadband modem class) */
+
+static void
+setup_ports (MMBroadbandModem *self)
+{
+    /* Call parent's setup ports first always */
+    MM_BROADBAND_MODEM_CLASS (mm_broadband_modem_simtech_parent_class)->setup_ports (self);
+
+    /* Now reset the unsolicited messages we'll handle when enabled */
+    set_unsolicited_events_handlers (MM_BROADBAND_MODEM_SIMTECH (self), FALSE);
+}
+
+/*****************************************************************************/
+
+MMBroadbandModemSimtech *
+mm_broadband_modem_simtech_new (const gchar *device,
+                                const gchar **drivers,
+                                const gchar *plugin,
+                                guint16 vendor_id,
+                                guint16 product_id)
+{
+    return g_object_new (MM_TYPE_BROADBAND_MODEM_SIMTECH,
+                         MM_BASE_MODEM_DEVICE, device,
+                         MM_BASE_MODEM_DRIVERS, drivers,
+                         MM_BASE_MODEM_PLUGIN, plugin,
+                         MM_BASE_MODEM_VENDOR_ID, vendor_id,
+                         MM_BASE_MODEM_PRODUCT_ID, product_id,
+                         /* Generic bearer supports TTY only */
+                         MM_BASE_MODEM_DATA_NET_SUPPORTED, FALSE,
+                         MM_BASE_MODEM_DATA_TTY_SUPPORTED, TRUE,
+                         MM_BROADBAND_MODEM_INDICATORS_DISABLED, TRUE,
+                         NULL);
+}
+
+static void
+mm_broadband_modem_simtech_init (MMBroadbandModemSimtech *self)
+{
+    /* Initialize private data */
+    self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
+                                              MM_TYPE_BROADBAND_MODEM_SIMTECH,
+                                              MMBroadbandModemSimtechPrivate);
+
+    self->priv->cnsmod_support = FEATURE_SUPPORT_UNKNOWN;
+    self->priv->autocsq_support = FEATURE_SUPPORT_UNKNOWN;
+
+    self->priv->cnsmod_regex = g_regex_new ("\\r\\n\\+CNSMOD:\\s*(\\d+)\\r\\n",
+                                            G_REGEX_RAW | G_REGEX_OPTIMIZE, 0, NULL);
+    self->priv->csq_regex    = g_regex_new ("\\r\\n\\+CSQ:\\s*(\\d+),(\\d+)\\r\\n",
+                                            G_REGEX_RAW | G_REGEX_OPTIMIZE, 0, NULL);
+}
+
+static void
+finalize (GObject *object)
+{
+    MMBroadbandModemSimtech *self = MM_BROADBAND_MODEM_SIMTECH (object);
+
+    g_regex_unref (self->priv->cnsmod_regex);
+    g_regex_unref (self->priv->csq_regex);
+
+    G_OBJECT_CLASS (mm_broadband_modem_simtech_parent_class)->finalize (object);
+}
+
+static void
+iface_modem_init (MMIfaceModem *iface)
+{
+    iface_modem_parent = g_type_interface_peek_parent (iface);
+
+    iface->load_signal_quality = load_signal_quality;
+    iface->load_signal_quality_finish = load_signal_quality_finish;
+    iface->load_access_technologies = load_access_technologies;
+    iface->load_access_technologies_finish = load_access_technologies_finish;
+    iface->load_supported_modes = load_supported_modes;
+    iface->load_supported_modes_finish = load_supported_modes_finish;
+    iface->load_current_modes = load_current_modes;
+    iface->load_current_modes_finish = load_current_modes_finish;
+    iface->set_current_modes = set_current_modes;
+    iface->set_current_modes_finish = set_current_modes_finish;
+}
+
+static void
+iface_modem_3gpp_init (MMIfaceModem3gpp *iface)
+{
+    iface_modem_3gpp_parent = g_type_interface_peek_parent (iface);
+
+    iface->setup_unsolicited_events = modem_3gpp_setup_unsolicited_events;
+    iface->setup_unsolicited_events_finish = modem_3gpp_setup_cleanup_unsolicited_events_finish;
+    iface->cleanup_unsolicited_events = modem_3gpp_cleanup_unsolicited_events;
+    iface->cleanup_unsolicited_events_finish = modem_3gpp_setup_cleanup_unsolicited_events_finish;
+
+    iface->enable_unsolicited_events = modem_3gpp_enable_unsolicited_events;
+    iface->enable_unsolicited_events_finish = modem_3gpp_enable_unsolicited_events_finish;
+    iface->disable_unsolicited_events = modem_3gpp_disable_unsolicited_events;
+    iface->disable_unsolicited_events_finish = modem_3gpp_disable_unsolicited_events_finish;
+}
+
+static void
+iface_modem_location_init (MMIfaceModemLocation *iface)
+{
+    iface_modem_location_parent = g_type_interface_peek_parent (iface);
+
+    iface->load_capabilities                 = mm_shared_simtech_location_load_capabilities;
+    iface->load_capabilities_finish          = mm_shared_simtech_location_load_capabilities_finish;
+    iface->enable_location_gathering         = mm_shared_simtech_enable_location_gathering;
+    iface->enable_location_gathering_finish  = mm_shared_simtech_enable_location_gathering_finish;
+    iface->disable_location_gathering        = mm_shared_simtech_disable_location_gathering;
+    iface->disable_location_gathering_finish = mm_shared_simtech_disable_location_gathering_finish;
+}
+
+static MMIfaceModemLocation *
+peek_parent_location_interface (MMSharedSimtech *self)
+{
+    return iface_modem_location_parent;
+}
+
+static void
+iface_modem_voice_init (MMIfaceModemVoice *iface)
+{
+    iface_modem_voice_parent = g_type_interface_peek_parent (iface);
+
+    iface->check_support                     = mm_shared_simtech_voice_check_support;
+    iface->check_support_finish              = mm_shared_simtech_voice_check_support_finish;
+    iface->enable_unsolicited_events         = mm_shared_simtech_voice_enable_unsolicited_events;
+    iface->enable_unsolicited_events_finish  = mm_shared_simtech_voice_enable_unsolicited_events_finish;
+    iface->disable_unsolicited_events        = mm_shared_simtech_voice_disable_unsolicited_events;
+    iface->disable_unsolicited_events_finish = mm_shared_simtech_voice_disable_unsolicited_events_finish;
+    iface->setup_unsolicited_events          = mm_shared_simtech_voice_setup_unsolicited_events;
+    iface->setup_unsolicited_events_finish   = mm_shared_simtech_voice_setup_unsolicited_events_finish;
+    iface->cleanup_unsolicited_events        = mm_shared_simtech_voice_cleanup_unsolicited_events;
+    iface->cleanup_unsolicited_events_finish = mm_shared_simtech_voice_cleanup_unsolicited_events_finish;
+    iface->setup_in_call_audio_channel          = mm_shared_simtech_voice_setup_in_call_audio_channel;
+    iface->setup_in_call_audio_channel_finish   = mm_shared_simtech_voice_setup_in_call_audio_channel_finish;
+    iface->cleanup_in_call_audio_channel        = mm_shared_simtech_voice_cleanup_in_call_audio_channel;
+    iface->cleanup_in_call_audio_channel_finish = mm_shared_simtech_voice_cleanup_in_call_audio_channel_finish;
+
+}
+
+static MMIfaceModemVoice *
+peek_parent_voice_interface (MMSharedSimtech *self)
+{
+    return iface_modem_voice_parent;
+}
+
+static void
+shared_simtech_init (MMSharedSimtech *iface)
+{
+    iface->peek_parent_location_interface = peek_parent_location_interface;
+    iface->peek_parent_voice_interface    = peek_parent_voice_interface;
+}
+
+static void
+mm_broadband_modem_simtech_class_init (MMBroadbandModemSimtechClass *klass)
+{
+    GObjectClass *object_class = G_OBJECT_CLASS (klass);
+    MMBroadbandModemClass *broadband_modem_class = MM_BROADBAND_MODEM_CLASS (klass);
+
+    g_type_class_add_private (object_class, sizeof (MMBroadbandModemSimtechPrivate));
+
+    object_class->finalize = finalize;
+
+    broadband_modem_class->setup_ports = setup_ports;
+}
diff --git a/src/plugins/simtech/mm-broadband-modem-simtech.h b/src/plugins/simtech/mm-broadband-modem-simtech.h
new file mode 100644
index 00000000..a2b57fea
--- /dev/null
+++ b/src/plugins/simtech/mm-broadband-modem-simtech.h
@@ -0,0 +1,51 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2008 - 2009 Novell, Inc.
+ * Copyright (C) 2009 - 2012 Red Hat, Inc.
+ * Copyright (C) 2012 Aleksander Morgado <aleksander@gnu.org>
+ */
+
+#ifndef MM_BROADBAND_MODEM_SIMTECH_H
+#define MM_BROADBAND_MODEM_SIMTECH_H
+
+#include "mm-broadband-modem.h"
+
+#define MM_TYPE_BROADBAND_MODEM_SIMTECH            (mm_broadband_modem_simtech_get_type ())
+#define MM_BROADBAND_MODEM_SIMTECH(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), MM_TYPE_BROADBAND_MODEM_SIMTECH, MMBroadbandModemSimtech))
+#define MM_BROADBAND_MODEM_SIMTECH_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  MM_TYPE_BROADBAND_MODEM_SIMTECH, MMBroadbandModemSimtechClass))
+#define MM_IS_BROADBAND_MODEM_SIMTECH(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), MM_TYPE_BROADBAND_MODEM_SIMTECH))
+#define MM_IS_BROADBAND_MODEM_SIMTECH_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  MM_TYPE_BROADBAND_MODEM_SIMTECH))
+#define MM_BROADBAND_MODEM_SIMTECH_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  MM_TYPE_BROADBAND_MODEM_SIMTECH, MMBroadbandModemSimtechClass))
+
+typedef struct _MMBroadbandModemSimtech MMBroadbandModemSimtech;
+typedef struct _MMBroadbandModemSimtechClass MMBroadbandModemSimtechClass;
+typedef struct _MMBroadbandModemSimtechPrivate MMBroadbandModemSimtechPrivate;
+
+struct _MMBroadbandModemSimtech {
+    MMBroadbandModem parent;
+    MMBroadbandModemSimtechPrivate *priv;
+};
+
+struct _MMBroadbandModemSimtechClass{
+    MMBroadbandModemClass parent;
+};
+
+GType mm_broadband_modem_simtech_get_type (void);
+
+MMBroadbandModemSimtech *mm_broadband_modem_simtech_new (const gchar *device,
+                                                         const gchar **drivers,
+                                                         const gchar *plugin,
+                                                         guint16 vendor_id,
+                                                         guint16 product_id);
+
+#endif /* MM_BROADBAND_MODEM_SIMTECH_H */
diff --git a/src/plugins/simtech/mm-modem-helpers-simtech.c b/src/plugins/simtech/mm-modem-helpers-simtech.c
new file mode 100644
index 00000000..0403c145
--- /dev/null
+++ b/src/plugins/simtech/mm-modem-helpers-simtech.c
@@ -0,0 +1,209 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2019 Aleksander Morgado <aleksander@aleksander.es>
+ */
+
+#include <config.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "ModemManager.h"
+#define _LIBMM_INSIDE_MM
+#include <libmm-glib.h>
+#include "mm-errors-types.h"
+#include "mm-modem-helpers-simtech.h"
+#include "mm-modem-helpers.h"
+
+
+/*****************************************************************************/
+/* +CLCC test parser
+ *
+ * Example (SIM7600E):
+ *   AT+CLCC=?
+ *   +CLCC: (0-1)
+ */
+
+gboolean
+mm_simtech_parse_clcc_test (const gchar  *response,
+                            gboolean     *clcc_urcs_supported,
+                            GError      **error)
+{
+    g_assert (response);
+
+    response = mm_strip_tag (response, "+CLCC:");
+
+    /* 3GPP specifies that the output of AT+CLCC=? should be just OK, so support
+     * that */
+    if (!response[0]) {
+        *clcc_urcs_supported = FALSE;
+        return TRUE;
+    }
+
+    /* As per 3GPP TS 27.007, the AT+CLCC command doesn't expect any argument,
+     * as it only is designed to report the current call list, nothing else.
+     * In the case of the Simtech plugin, though, we are going to support +CLCC
+     * URCs that can be enabled/disabled via AT+CLCC=1/0. We therefore need to
+     * detect whether this URC management is possible or not, for now with a
+     * simple check looking for the specific "(0-1)" string.
+     */
+    if (!strncmp (response, "(0-1)", 5)) {
+        *clcc_urcs_supported = TRUE;
+        return TRUE;
+    }
+
+    g_set_error (error, MM_CORE_ERROR, MM_CORE_ERROR_FAILED,
+                 "unexpected +CLCC test response: '%s'", response);
+    return FALSE;
+}
+
+/*****************************************************************************/
+
+GRegex *
+mm_simtech_get_clcc_urc_regex (void)
+{
+    return g_regex_new ("\\r\\n(\\+CLCC: .*\\r\\n)+",
+                        G_REGEX_RAW | G_REGEX_OPTIMIZE, 0, NULL);
+}
+
+gboolean
+mm_simtech_parse_clcc_list (const gchar *str,
+                            gpointer     log_object,
+                            GList      **out_list,
+                            GError     **error)
+{
+    /* Parse the URC contents as a plain +CLCC response, but make sure to skip first
+     * EOL in the string because the plain +CLCC response would never have that.
+     */
+    return mm_3gpp_parse_clcc_response (mm_strip_tag (str, "\r\n"), log_object, out_list, error);
+}
+
+void
+mm_simtech_call_info_list_free (GList *call_info_list)
+{
+    mm_3gpp_call_info_list_free (call_info_list);
+}
+
+/*****************************************************************************/
+
+/*
+ * <CR><LF>VOICE CALL: BEGIN<CR><LF>
+ * <CR><LF>VOICE CALL: END: 000041<CR><LF>
+ */
+GRegex *
+mm_simtech_get_voice_call_urc_regex (void)
+{
+    return g_regex_new ("\\r\\nVOICE CALL:\\s*([A-Z]+)(?::\\s*(\\d+))?\\r\\n",
+                        G_REGEX_RAW | G_REGEX_OPTIMIZE, 0, NULL);
+}
+
+gboolean
+mm_simtech_parse_voice_call_urc (GMatchInfo  *match_info,
+                                 gboolean    *start_or_stop,
+                                 guint       *duration,
+                                 GError     **error)
+{
+    GError *inner_error = NULL;
+    gchar  *str;
+
+    str = mm_get_string_unquoted_from_match_info (match_info, 1);
+    if (!str) {
+        inner_error = g_error_new (MM_CORE_ERROR, MM_CORE_ERROR_FAILED,
+                                   "Couldn't read voice call URC action");
+        goto out;
+    }
+
+    if (g_strcmp0 (str, "BEGIN") == 0) {
+        *start_or_stop = TRUE;
+        *duration = 0;
+        goto out;
+    }
+
+    if (g_strcmp0 (str, "END") == 0) {
+        *start_or_stop = FALSE;
+        if (!mm_get_uint_from_match_info (match_info, 2, duration))
+            *duration = 0;
+        goto out;
+    }
+
+    inner_error = g_error_new (MM_CORE_ERROR, MM_CORE_ERROR_FAILED,
+                               "Unknown voice call URC action: %s", str);
+
+out:
+    g_free (str);
+    if (inner_error) {
+        g_propagate_error (error, inner_error);
+        return FALSE;
+    }
+
+    return TRUE;
+}
+
+/*****************************************************************************/
+
+/*
+ * <CR><LF>MISSED_CALL: 11:01AM 07712345678<CR><LF>
+ */
+GRegex *
+mm_simtech_get_missed_call_urc_regex (void)
+{
+    return g_regex_new ("\\r\\nMISSED_CALL:\\s*(.+)\\r\\n",
+                        G_REGEX_RAW | G_REGEX_OPTIMIZE, 0, NULL);
+}
+
+gboolean
+mm_simtech_parse_missed_call_urc (GMatchInfo  *match_info,
+                                  gchar      **details,
+                                  GError     **error)
+{
+    gchar *str;
+
+    str = mm_get_string_unquoted_from_match_info (match_info, 1);
+    if (!str) {
+        g_set_error (error, MM_CORE_ERROR, MM_CORE_ERROR_FAILED,
+                     "Couldn't read missed call URC details");
+        return FALSE;
+    }
+
+    *details = str;
+    return TRUE;
+}
+
+/*****************************************************************************/
+
+/*
+ * Using TWO <CR> instead of one...
+ * <CR><CR><LF>+CRING: VOICE<CR><CR><LF>
+ */
+GRegex *
+mm_simtech_get_cring_urc_regex (void)
+{
+    return g_regex_new ("(?:\\r)+\\n\\+CRING:\\s*(\\S+)(?:\\r)+\\n",
+                        G_REGEX_RAW | G_REGEX_OPTIMIZE, 0, NULL);
+}
+
+/*****************************************************************************/
+
+/*
+ * <CR><CR><LF>+RXDTMF: 8<CR><CR><LF>
+ * <CR><CR><LF>+RXDTMF: *<CR><CR><LF>
+ * <CR><CR><LF>+RXDTMF: 7<CR><CR><LF>
+ *
+ * Note! using TWO <CR> instead of one...
+ */
+GRegex *
+mm_simtech_get_rxdtmf_urc_regex (void)
+{
+    return g_regex_new ("(?:\\r)+\\n\\+RXDTMF:\\s*([0-9A-D\\*\\#])(?:\\r)+\\n",
+                        G_REGEX_RAW | G_REGEX_OPTIMIZE, 0, NULL);
+}
diff --git a/src/plugins/simtech/mm-modem-helpers-simtech.h b/src/plugins/simtech/mm-modem-helpers-simtech.h
new file mode 100644
index 00000000..1949d2e7
--- /dev/null
+++ b/src/plugins/simtech/mm-modem-helpers-simtech.h
@@ -0,0 +1,67 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2019 Aleksander Morgado <aleksander@aleksander.es>
+ */
+
+#ifndef MM_MODEM_HELPERS_SIMTECH_H
+#define MM_MODEM_HELPERS_SIMTECH_H
+
+#include <glib.h>
+
+#include <ModemManager.h>
+#include <mm-base-bearer.h>
+#define _LIBMM_INSIDE_MM
+#include <libmm-glib.h>
+
+/*****************************************************************************/
+/* +CLCC URC helpers */
+
+gboolean mm_simtech_parse_clcc_test (const gchar  *response,
+                                     gboolean     *clcc_urcs_supported,
+                                     GError      **error);
+
+GRegex   *mm_simtech_get_clcc_urc_regex  (void);
+gboolean  mm_simtech_parse_clcc_list     (const gchar *str,
+                                          gpointer     log_object,
+                                          GList      **out_list,
+                                          GError     **error);
+void      mm_simtech_call_info_list_free (GList       *call_info_list);
+
+/*****************************************************************************/
+/* VOICE CALL URC helpers */
+
+GRegex   *mm_simtech_get_voice_call_urc_regex (void);
+gboolean  mm_simtech_parse_voice_call_urc     (GMatchInfo  *match_info,
+                                               gboolean    *start_or_stop,
+                                               guint       *duration,
+                                               GError     **error);
+
+/*****************************************************************************/
+/* MISSED_CALL URC helpers */
+
+GRegex   *mm_simtech_get_missed_call_urc_regex (void);
+gboolean  mm_simtech_parse_missed_call_urc     (GMatchInfo  *match_info,
+                                                gchar      **details,
+                                                GError     **error);
+
+/*****************************************************************************/
+/* Non-standard CRING URC helpers */
+
+GRegex *mm_simtech_get_cring_urc_regex (void);
+
+/*****************************************************************************/
+/* +RXDTMF URC helpers */
+
+GRegex *mm_simtech_get_rxdtmf_urc_regex (void);
+
+#endif  /* MM_MODEM_HELPERS_SIMTECH_H */
diff --git a/src/plugins/simtech/mm-plugin-simtech.c b/src/plugins/simtech/mm-plugin-simtech.c
new file mode 100644
index 00000000..9b4f377e
--- /dev/null
+++ b/src/plugins/simtech/mm-plugin-simtech.c
@@ -0,0 +1,98 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2008 - 2009 Novell, Inc.
+ * Copyright (C) 2009 - 2012 Red Hat, Inc.
+ * Copyright (C) 2012 Aleksander Morgado <aleksander@gnu.org>
+ */
+
+#include <string.h>
+#include <gmodule.h>
+
+#define _LIBMM_INSIDE_MM
+#include <libmm-glib.h>
+
+#include "mm-log-object.h"
+#include "mm-plugin-simtech.h"
+#include "mm-broadband-modem-simtech.h"
+
+#if defined WITH_QMI
+#include "mm-broadband-modem-qmi-simtech.h"
+#endif
+
+G_DEFINE_TYPE (MMPluginSimtech, mm_plugin_simtech, MM_TYPE_PLUGIN)
+
+MM_PLUGIN_DEFINE_MAJOR_VERSION
+MM_PLUGIN_DEFINE_MINOR_VERSION
+
+/*****************************************************************************/
+
+static MMBaseModem *
+create_modem (MMPlugin *self,
+              const gchar *uid,
+              const gchar **drivers,
+              guint16 vendor,
+              guint16 product,
+              guint16 subsystem_vendor,
+              GList *probes,
+              GError **error)
+{
+#if defined WITH_QMI
+    if (mm_port_probe_list_has_qmi_port (probes)) {
+        mm_obj_dbg (self, "QMI-powered SimTech modem found...");
+        return MM_BASE_MODEM (mm_broadband_modem_qmi_simtech_new (uid,
+                                                                  drivers,
+                                                                  mm_plugin_get_name (self),
+                                                                  vendor,
+                                                                  product));
+    }
+#endif
+
+    return MM_BASE_MODEM (mm_broadband_modem_simtech_new (uid,
+                                                          drivers,
+                                                          mm_plugin_get_name (self),
+                                                          vendor,
+                                                          product));
+}
+
+/*****************************************************************************/
+
+G_MODULE_EXPORT MMPlugin *
+mm_plugin_create (void)
+{
+    static const gchar *subsystems[] = { "tty", "net", "usbmisc", NULL };
+    static const guint16 vendor_ids[] = { 0x1e0e, /* A-Link (for now) */
+                                          0 };
+
+    return MM_PLUGIN (
+        g_object_new (MM_TYPE_PLUGIN_SIMTECH,
+                      MM_PLUGIN_NAME,               MM_MODULE_NAME,
+                      MM_PLUGIN_ALLOWED_SUBSYSTEMS, subsystems,
+                      MM_PLUGIN_ALLOWED_VENDOR_IDS, vendor_ids,
+                      MM_PLUGIN_ALLOWED_AT,         TRUE,
+                      MM_PLUGIN_ALLOWED_QCDM,       TRUE,
+                      MM_PLUGIN_ALLOWED_QMI,        TRUE,
+                      NULL));
+}
+
+static void
+mm_plugin_simtech_init (MMPluginSimtech *self)
+{
+}
+
+static void
+mm_plugin_simtech_class_init (MMPluginSimtechClass *klass)
+{
+    MMPluginClass *plugin_class = MM_PLUGIN_CLASS (klass);
+
+    plugin_class->create_modem = create_modem;
+}
diff --git a/src/plugins/simtech/mm-plugin-simtech.h b/src/plugins/simtech/mm-plugin-simtech.h
new file mode 100644
index 00000000..eab8630c
--- /dev/null
+++ b/src/plugins/simtech/mm-plugin-simtech.h
@@ -0,0 +1,42 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2008 - 2009 Novell, Inc.
+ * Copyright (C) 2009 - 2012 Red Hat, Inc.
+ * Copyright (C) 2012 Aleksander Morgado <aleksander@gnu.org>
+ */
+
+#ifndef MM_PLUGIN_SIMTECH_H
+#define MM_PLUGIN_SIMTECH_H
+
+#include "mm-plugin.h"
+
+#define MM_TYPE_PLUGIN_SIMTECH            (mm_plugin_simtech_get_type ())
+#define MM_PLUGIN_SIMTECH(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), MM_TYPE_PLUGIN_SIMTECH, MMPluginSimtech))
+#define MM_PLUGIN_SIMTECH_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass),  MM_TYPE_PLUGIN_SIMTECH, MMPluginSimtechClass))
+#define MM_IS_PLUGIN_SIMTECH(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), MM_TYPE_PLUGIN_SIMTECH))
+#define MM_IS_PLUGIN_SIMTECH_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass),  MM_TYPE_PLUGIN_SIMTECH))
+#define MM_PLUGIN_SIMTECH_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj),  MM_TYPE_PLUGIN_SIMTECH, MMPluginSimtechClass))
+
+typedef struct {
+    MMPlugin parent;
+} MMPluginSimtech;
+
+typedef struct {
+    MMPluginClass parent;
+} MMPluginSimtechClass;
+
+GType mm_plugin_simtech_get_type (void);
+
+G_MODULE_EXPORT MMPlugin *mm_plugin_create (void);
+
+#endif /* MM_PLUGIN_SIMTECH_H */
diff --git a/src/plugins/simtech/mm-shared-simtech.c b/src/plugins/simtech/mm-shared-simtech.c
new file mode 100644
index 00000000..99c2346e
--- /dev/null
+++ b/src/plugins/simtech/mm-shared-simtech.c
@@ -0,0 +1,1261 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2019 Aleksander Morgado <aleksander@aleksander.es>
+ */
+
+#include <config.h>
+
+#include <glib-object.h>
+#include <gio/gio.h>
+
+#define _LIBMM_INSIDE_MM
+#include <libmm-glib.h>
+
+#include "mm-log-object.h"
+#include "mm-iface-modem.h"
+#include "mm-iface-modem-voice.h"
+#include "mm-iface-modem-location.h"
+#include "mm-base-modem.h"
+#include "mm-base-modem-at.h"
+#include "mm-shared-simtech.h"
+#include "mm-modem-helpers-simtech.h"
+
+/*****************************************************************************/
+/* Private data context */
+
+#define PRIVATE_TAG "shared-simtech-private-tag"
+static GQuark private_quark;
+
+typedef enum {
+    FEATURE_SUPPORT_UNKNOWN,
+    FEATURE_NOT_SUPPORTED,
+    FEATURE_SUPPORTED,
+} FeatureSupport;
+
+typedef struct {
+    /* location */
+    MMIfaceModemLocation  *iface_modem_location_parent;
+    MMModemLocationSource  supported_sources;
+    MMModemLocationSource  enabled_sources;
+    FeatureSupport         cgps_support;
+    /* voice */
+    MMIfaceModemVoice     *iface_modem_voice_parent;
+    FeatureSupport         cpcmreg_support;
+    FeatureSupport         clcc_urc_support;
+    GRegex                *clcc_urc_regex;
+    GRegex                *voice_call_regex;
+    GRegex                *missed_call_regex;
+    GRegex                *cring_regex;
+    GRegex                *rxdtmf_regex;
+} Private;
+
+static void
+private_free (Private *ctx)
+{
+    g_regex_unref (ctx->rxdtmf_regex);
+    g_regex_unref (ctx->cring_regex);
+    g_regex_unref (ctx->missed_call_regex);
+    g_regex_unref (ctx->voice_call_regex);
+    g_regex_unref (ctx->clcc_urc_regex);
+    g_slice_free (Private, ctx);
+}
+
+static Private *
+get_private (MMSharedSimtech *self)
+{
+    Private *priv;
+
+    if (G_UNLIKELY (!private_quark))
+        private_quark =  (g_quark_from_static_string (PRIVATE_TAG));
+
+    priv = g_object_get_qdata (G_OBJECT (self), private_quark);
+    if (!priv) {
+        priv = g_slice_new0 (Private);
+        priv->supported_sources = MM_MODEM_LOCATION_SOURCE_NONE;
+        priv->enabled_sources = MM_MODEM_LOCATION_SOURCE_NONE;
+        priv->cgps_support = FEATURE_SUPPORT_UNKNOWN;
+        priv->cpcmreg_support = FEATURE_SUPPORT_UNKNOWN;
+        priv->clcc_urc_support = FEATURE_SUPPORT_UNKNOWN;
+        priv->clcc_urc_regex = mm_simtech_get_clcc_urc_regex ();
+        priv->voice_call_regex = mm_simtech_get_voice_call_urc_regex ();
+        priv->missed_call_regex = mm_simtech_get_missed_call_urc_regex ();
+        priv->cring_regex = mm_simtech_get_cring_urc_regex ();
+        priv->rxdtmf_regex = mm_simtech_get_rxdtmf_urc_regex ();
+
+        /* Setup parent class' MMIfaceModemLocation and MMIfaceModemVoice */
+
+        g_assert (MM_SHARED_SIMTECH_GET_INTERFACE (self)->peek_parent_location_interface);
+        priv->iface_modem_location_parent = MM_SHARED_SIMTECH_GET_INTERFACE (self)->peek_parent_location_interface (self);
+
+        g_assert (MM_SHARED_SIMTECH_GET_INTERFACE (self)->peek_parent_voice_interface);
+        priv->iface_modem_voice_parent = MM_SHARED_SIMTECH_GET_INTERFACE (self)->peek_parent_voice_interface (self);
+
+        g_object_set_qdata_full (G_OBJECT (self), private_quark, priv, (GDestroyNotify)private_free);
+    }
+
+    return priv;
+}
+
+/*****************************************************************************/
+/* GPS trace received */
+
+static void
+trace_received (MMPortSerialGps      *port,
+                const gchar          *trace,
+                MMIfaceModemLocation *self)
+{
+    mm_iface_modem_location_gps_update (self, trace);
+}
+
+/*****************************************************************************/
+/* Location capabilities loading (Location interface) */
+
+MMModemLocationSource
+mm_shared_simtech_location_load_capabilities_finish (MMIfaceModemLocation  *self,
+                                                     GAsyncResult          *res,
+                                                     GError               **error)
+{
+    GError *inner_error = NULL;
+    gssize aux;
+
+    aux = g_task_propagate_int (G_TASK (res), &inner_error);
+    if (inner_error) {
+        g_propagate_error (error, inner_error);
+        return MM_MODEM_LOCATION_SOURCE_NONE;
+    }
+    return (MMModemLocationSource) aux;
+}
+
+static void probe_gps_features (GTask *task);
+
+static void
+cgps_test_ready (MMBaseModem  *self,
+                 GAsyncResult *res,
+                 GTask        *task)
+{
+    Private *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    if (!mm_base_modem_at_command_finish (self, res, NULL))
+        priv->cgps_support = FEATURE_NOT_SUPPORTED;
+    else
+        priv->cgps_support = FEATURE_SUPPORTED;
+
+    probe_gps_features (task);
+}
+
+static void
+probe_gps_features (GTask *task)
+{
+    MMSharedSimtech       *self;
+    MMModemLocationSource  sources;
+    Private               *priv;
+
+    self = MM_SHARED_SIMTECH (g_task_get_source_object (task));
+    priv = get_private (self);
+
+    /* Need to check if CGPS supported... */
+    if (priv->cgps_support == FEATURE_SUPPORT_UNKNOWN) {
+        mm_base_modem_at_command (MM_BASE_MODEM (self), "+CGPS=?", 3, TRUE, (GAsyncReadyCallback) cgps_test_ready, task);
+        return;
+    }
+
+    /* All GPS features probed */
+
+    /* Recover parent sources */
+    sources = GPOINTER_TO_UINT (g_task_get_task_data (task));
+
+    if (priv->cgps_support == FEATURE_SUPPORTED) {
+        mm_obj_dbg (self, "GPS commands supported: GPS capabilities enabled");
+
+        /* We only flag as supported by this implementation those sources not already
+         * supported by the parent implementation */
+        if (!(sources & MM_MODEM_LOCATION_SOURCE_GPS_NMEA))
+            priv->supported_sources |= MM_MODEM_LOCATION_SOURCE_GPS_NMEA;
+        if (!(sources & MM_MODEM_LOCATION_SOURCE_GPS_RAW))
+            priv->supported_sources |= MM_MODEM_LOCATION_SOURCE_GPS_RAW;
+        if (!(sources & MM_MODEM_LOCATION_SOURCE_GPS_UNMANAGED))
+            priv->supported_sources |= MM_MODEM_LOCATION_SOURCE_GPS_UNMANAGED;
+
+        sources |= priv->supported_sources;
+
+        /* Add handler for the NMEA traces in the GPS data port */
+        mm_port_serial_gps_add_trace_handler (mm_base_modem_peek_port_gps (MM_BASE_MODEM (self)),
+                                              (MMPortSerialGpsTraceFn)trace_received,
+                                              self,
+                                              NULL);
+    } else
+        mm_obj_dbg (self, "no GPS command supported: no GPS capabilities");
+
+    g_task_return_int (task, (gssize) sources);
+    g_object_unref (task);
+}
+
+static void
+parent_load_capabilities_ready (MMIfaceModemLocation *self,
+                                GAsyncResult         *res,
+                                GTask                *task)
+{
+    MMModemLocationSource  sources;
+    GError                *error = NULL;
+    Private               *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    sources = priv->iface_modem_location_parent->load_capabilities_finish (self, res, &error);
+    if (error) {
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
+    }
+
+    /* Now our own check. If we don't have any GPS port, we're done */
+    if (!mm_base_modem_peek_port_gps (MM_BASE_MODEM (self))) {
+        mm_obj_dbg (self, "no GPS data port found: no GPS capabilities");
+        g_task_return_int (task, sources);
+        g_object_unref (task);
+        return;
+    }
+
+    /* Cache sources supported by the parent */
+    g_task_set_task_data (task, GUINT_TO_POINTER (sources), NULL);
+
+    /* Probe all GPS features */
+    probe_gps_features (task);
+}
+
+void
+mm_shared_simtech_location_load_capabilities (MMIfaceModemLocation *self,
+                                              GAsyncReadyCallback   callback,
+                                              gpointer              user_data)
+{
+    Private *priv;
+    GTask   *task;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+    task = g_task_new (self, NULL, callback, user_data);
+
+    g_assert (priv->iface_modem_location_parent);
+    g_assert (priv->iface_modem_location_parent->load_capabilities);
+    g_assert (priv->iface_modem_location_parent->load_capabilities_finish);
+
+    priv->iface_modem_location_parent->load_capabilities (self,
+                                                          (GAsyncReadyCallback)parent_load_capabilities_ready,
+                                                          task);
+}
+
+/*****************************************************************************/
+/* Disable location gathering (Location interface) */
+
+gboolean
+mm_shared_simtech_disable_location_gathering_finish (MMIfaceModemLocation  *self,
+                                                     GAsyncResult          *res,
+                                                     GError               **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+disable_cgps_ready (MMBaseModem  *self,
+                    GAsyncResult *res,
+                    GTask        *task)
+{
+    MMModemLocationSource  source;
+    Private               *priv;
+    GError                *error = NULL;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    mm_base_modem_at_command_finish (self, res, &error);
+
+    /* Only use the GPS port in NMEA/RAW setups */
+    source = (MMModemLocationSource) GPOINTER_TO_UINT (g_task_get_task_data (task));
+    if (source & (MM_MODEM_LOCATION_SOURCE_GPS_NMEA | MM_MODEM_LOCATION_SOURCE_GPS_RAW)) {
+        MMPortSerialGps *gps_port;
+
+        /* Even if we get an error here, we try to close the GPS port */
+        gps_port = mm_base_modem_peek_port_gps (MM_BASE_MODEM (self));
+        if (gps_port)
+            mm_port_serial_close (MM_PORT_SERIAL (gps_port));
+    }
+
+    if (error)
+        g_task_return_error (task, error);
+    else {
+        priv->enabled_sources &= ~source;
+        g_task_return_boolean (task, TRUE);
+    }
+    g_object_unref (task);
+}
+
+static void
+parent_disable_location_gathering_ready (MMIfaceModemLocation *self,
+                                         GAsyncResult         *res,
+                                         GTask                *task)
+{
+    GError  *error = NULL;
+    Private *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    g_assert (priv->iface_modem_location_parent);
+    if (!priv->iface_modem_location_parent->disable_location_gathering_finish (self, res, &error))
+        g_task_return_error (task, error);
+    else
+        g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+void
+mm_shared_simtech_disable_location_gathering (MMIfaceModemLocation  *self,
+                                              MMModemLocationSource  source,
+                                              GAsyncReadyCallback    callback,
+                                              gpointer               user_data)
+{
+    MMModemLocationSource  enabled_sources;
+    Private               *priv;
+    GTask                 *task;
+
+    task = g_task_new (self, NULL, callback, user_data);
+    g_task_set_task_data (task, GUINT_TO_POINTER (source), NULL);
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+    g_assert (priv->iface_modem_location_parent);
+
+    /* Only consider request if it applies to one of the sources we are
+     * supporting, otherwise run parent disable */
+    if (!(priv->supported_sources & source)) {
+        /* If disabling implemented by the parent, run it. */
+        if (priv->iface_modem_location_parent->disable_location_gathering &&
+            priv->iface_modem_location_parent->disable_location_gathering_finish) {
+            priv->iface_modem_location_parent->disable_location_gathering (self,
+                                                                           source,
+                                                                           (GAsyncReadyCallback)parent_disable_location_gathering_ready,
+                                                                           task);
+            return;
+        }
+        /* Otherwise, we're done */
+        g_task_return_boolean (task, TRUE);
+        g_object_unref (task);
+        return;
+    }
+
+    /* We only expect GPS sources here */
+    g_assert (source & (MM_MODEM_LOCATION_SOURCE_GPS_NMEA |
+                        MM_MODEM_LOCATION_SOURCE_GPS_RAW |
+                        MM_MODEM_LOCATION_SOURCE_GPS_UNMANAGED));
+
+    /* Flag as disabled to see how many others we would have left enabled */
+    enabled_sources = priv->enabled_sources;
+    enabled_sources &= ~source;
+
+    /* If there are still GPS-related sources enabled, do nothing else */
+    if (enabled_sources & (MM_MODEM_LOCATION_SOURCE_GPS_NMEA |
+                           MM_MODEM_LOCATION_SOURCE_GPS_RAW |
+                           MM_MODEM_LOCATION_SOURCE_GPS_UNMANAGED)) {
+        priv->enabled_sources &= ~source;
+        g_task_return_boolean (task, TRUE);
+        g_object_unref (task);
+        return;
+    }
+
+    /* Stop GPS engine if all GPS-related sources are disabled */
+    g_assert (priv->cgps_support == FEATURE_SUPPORTED);
+    mm_base_modem_at_command (MM_BASE_MODEM (self),
+                              "+CGPS=0",
+                              10,
+                              FALSE,
+                              (GAsyncReadyCallback) disable_cgps_ready,
+                              task);
+}
+
+/*****************************************************************************/
+/* Enable location gathering (Location interface) */
+
+gboolean
+mm_shared_simtech_enable_location_gathering_finish (MMIfaceModemLocation  *self,
+                                                    GAsyncResult          *res,
+                                                    GError               **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+enable_cgps_ready (MMBaseModem  *self,
+                   GAsyncResult *res,
+                   GTask        *task)
+{
+    MMModemLocationSource  source;
+    GError                *error = NULL;
+    Private               *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    if (!mm_base_modem_at_command_finish (self, res, &error)) {
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
+    }
+
+    /* Only use the GPS port in NMEA/RAW setups */
+    source = (MMModemLocationSource) GPOINTER_TO_UINT (g_task_get_task_data (task));
+    if (source & (MM_MODEM_LOCATION_SOURCE_GPS_NMEA |
+                  MM_MODEM_LOCATION_SOURCE_GPS_RAW)) {
+        MMPortSerialGps *gps_port;
+
+        gps_port = mm_base_modem_peek_port_gps (MM_BASE_MODEM (self));
+        if (!gps_port || !mm_port_serial_open (MM_PORT_SERIAL (gps_port), &error)) {
+            if (error)
+                g_task_return_error (task, error);
+            else
+                g_task_return_new_error (task, MM_CORE_ERROR, MM_CORE_ERROR_FAILED,
+                                         "Couldn't open raw GPS serial port");
+            g_object_unref (task);
+            return;
+        }
+    }
+
+    priv->enabled_sources |= source;
+    g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+static void
+parent_enable_location_gathering_ready (MMIfaceModemLocation *self,
+                                        GAsyncResult         *res,
+                                        GTask                *task)
+{
+    GError  *error = NULL;
+    Private *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    g_assert (priv->iface_modem_location_parent);
+    if (!priv->iface_modem_location_parent->enable_location_gathering_finish (self, res, &error))
+        g_task_return_error (task, error);
+    else
+        g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+void
+mm_shared_simtech_enable_location_gathering (MMIfaceModemLocation  *self,
+                                             MMModemLocationSource  source,
+                                             GAsyncReadyCallback    callback,
+                                             gpointer               user_data)
+{
+    Private *priv;
+    GTask   *task;
+
+    task = g_task_new (self, NULL, callback, user_data);
+    g_task_set_task_data (task, GUINT_TO_POINTER (source), NULL);
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+    g_assert (priv->iface_modem_location_parent);
+    g_assert (priv->iface_modem_location_parent->enable_location_gathering);
+    g_assert (priv->iface_modem_location_parent->enable_location_gathering_finish);
+
+    /* Only consider request if it applies to one of the sources we are
+     * supporting, otherwise run parent enable */
+    if (!(priv->supported_sources & source)) {
+        priv->iface_modem_location_parent->enable_location_gathering (self,
+                                                                      source,
+                                                                      (GAsyncReadyCallback)parent_enable_location_gathering_ready,
+                                                                      task);
+        return;
+    }
+
+    /* We only expect GPS sources here */
+    g_assert (source & (MM_MODEM_LOCATION_SOURCE_GPS_NMEA |
+                        MM_MODEM_LOCATION_SOURCE_GPS_RAW |
+                        MM_MODEM_LOCATION_SOURCE_GPS_UNMANAGED));
+
+    /* If GPS already started, store new flag and we're done */
+    if (priv->enabled_sources & (MM_MODEM_LOCATION_SOURCE_GPS_NMEA |
+                                 MM_MODEM_LOCATION_SOURCE_GPS_RAW |
+                                 MM_MODEM_LOCATION_SOURCE_GPS_UNMANAGED)) {
+        priv->enabled_sources |= source;
+        g_task_return_boolean (task, TRUE);
+        g_object_unref (task);
+        return;
+    }
+
+    g_assert (priv->cgps_support == FEATURE_SUPPORTED);
+    mm_base_modem_at_command (MM_BASE_MODEM (self),
+                              "+CGPS=1,1",
+                              10,
+                              FALSE,
+                              (GAsyncReadyCallback) enable_cgps_ready,
+                              task);
+}
+
+/*****************************************************************************/
+/* Common enable/disable voice unsolicited events */
+
+typedef struct {
+    gboolean        enable;
+    MMPortSerialAt *primary;
+    MMPortSerialAt *secondary;
+    gchar          *clcc_command;
+    gboolean        clcc_primary_done;
+    gboolean        clcc_secondary_done;
+} VoiceUnsolicitedEventsContext;
+
+static void
+voice_unsolicited_events_context_free (VoiceUnsolicitedEventsContext *ctx)
+{
+    g_clear_object (&ctx->secondary);
+    g_clear_object (&ctx->primary);
+    g_free (ctx->clcc_command);
+    g_slice_free (VoiceUnsolicitedEventsContext, ctx);
+}
+
+static gboolean
+common_voice_enable_disable_unsolicited_events_finish (MMSharedSimtech  *self,
+                                                       GAsyncResult       *res,
+                                                       GError            **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void run_voice_enable_disable_unsolicited_events (GTask *task);
+
+static void
+clcc_command_ready (MMBaseModem  *self,
+                    GAsyncResult *res,
+                    GTask        *task)
+{
+    VoiceUnsolicitedEventsContext *ctx;
+    GError                        *error = NULL;
+
+    ctx = g_task_get_task_data (task);
+
+    if (!mm_base_modem_at_command_finish (self, res, &error)) {
+        mm_obj_dbg (self, "couldn't %s +CLCC reporting: '%s'",
+                    ctx->enable ? "enable" : "disable",
+                    error->message);
+        g_error_free (error);
+    }
+
+    /* Continue on next port */
+    run_voice_enable_disable_unsolicited_events (task);
+}
+
+static void
+run_voice_enable_disable_unsolicited_events (GTask *task)
+{
+    MMSharedSimtech               *self;
+    Private                       *priv;
+    VoiceUnsolicitedEventsContext *ctx;
+    MMPortSerialAt                *port = NULL;
+
+    self = MM_SHARED_SIMTECH (g_task_get_source_object (task));
+    priv = get_private (self);
+    ctx  = g_task_get_task_data (task);
+
+    /* If +CLCC URCs not supported, we're done */
+    if (priv->clcc_urc_support == FEATURE_NOT_SUPPORTED) {
+        g_task_return_boolean (task, TRUE);
+        g_object_unref (task);
+        return;
+    }
+
+    if (!ctx->clcc_primary_done && ctx->primary) {
+        mm_obj_dbg (self, "%s +CLCC extended list of current calls reporting in primary port...",
+                    ctx->enable ? "enabling" : "disabling");
+        ctx->clcc_primary_done = TRUE;
+        port = ctx->primary;
+    } else if (!ctx->clcc_secondary_done && ctx->secondary) {
+        mm_obj_dbg (self, "%s +CLCC extended list of current calls reporting in secondary port...",
+                    ctx->enable ? "enabling" : "disabling");
+        ctx->clcc_secondary_done = TRUE;
+        port = ctx->secondary;
+    }
+
+    if (port) {
+        mm_base_modem_at_command_full (MM_BASE_MODEM (self),
+                                       port,
+                                       ctx->clcc_command,
+                                       3,
+                                       FALSE,
+                                       FALSE,
+                                       NULL,
+                                       (GAsyncReadyCallback)clcc_command_ready,
+                                       task);
+        return;
+    }
+
+    /* Fully done now */
+    g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+static void
+common_voice_enable_disable_unsolicited_events (MMSharedSimtech     *self,
+                                                gboolean             enable,
+                                                GAsyncReadyCallback  callback,
+                                                gpointer             user_data)
+{
+    VoiceUnsolicitedEventsContext *ctx;
+    GTask                         *task;
+
+    task = g_task_new (self, NULL, callback, user_data);
+
+    ctx = g_slice_new0 (VoiceUnsolicitedEventsContext);
+    ctx->enable = enable;
+    if (enable)
+        ctx->clcc_command = g_strdup ("+CLCC=1");
+    else
+        ctx->clcc_command = g_strdup ("+CLCC=0");
+    ctx->primary = mm_base_modem_get_port_primary (MM_BASE_MODEM (self));
+    ctx->secondary = mm_base_modem_get_port_secondary (MM_BASE_MODEM (self));
+    g_task_set_task_data (task, ctx, (GDestroyNotify) voice_unsolicited_events_context_free);
+
+    run_voice_enable_disable_unsolicited_events (task);
+}
+
+/*****************************************************************************/
+/* Disable unsolicited events (Voice interface) */
+
+gboolean
+mm_shared_simtech_voice_disable_unsolicited_events_finish (MMIfaceModemVoice  *self,
+                                                           GAsyncResult       *res,
+                                                           GError            **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+parent_voice_disable_unsolicited_events_ready (MMIfaceModemVoice *self,
+                                               GAsyncResult      *res,
+                                               GTask             *task)
+{
+    GError  *error = NULL;
+    Private *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    if (!priv->iface_modem_voice_parent->disable_unsolicited_events_finish (self, res, &error)) {
+        mm_obj_warn (self, "couldn't disable parent voice unsolicited events: %s", error->message);
+        g_error_free (error);
+    }
+
+    g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+static void
+voice_disable_unsolicited_events_ready (MMSharedSimtech *self,
+                                        GAsyncResult      *res,
+                                        GTask             *task)
+{
+    Private *priv;
+    GError  *error = NULL;
+
+    if (!common_voice_enable_disable_unsolicited_events_finish (self, res, &error)) {
+        mm_obj_warn (self, "couldn't disable Simtech-specific voice unsolicited events: %s", error->message);
+        g_error_free (error);
+    }
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+    g_assert (priv->iface_modem_voice_parent);
+    g_assert (priv->iface_modem_voice_parent->disable_unsolicited_events);
+    g_assert (priv->iface_modem_voice_parent->disable_unsolicited_events_finish);
+
+    /* Chain up parent's disable */
+    priv->iface_modem_voice_parent->disable_unsolicited_events (
+        MM_IFACE_MODEM_VOICE (self),
+        (GAsyncReadyCallback)parent_voice_disable_unsolicited_events_ready,
+        task);
+}
+
+void
+mm_shared_simtech_voice_disable_unsolicited_events (MMIfaceModemVoice   *self,
+                                                    GAsyncReadyCallback  callback,
+                                                    gpointer             user_data)
+{
+    GTask *task;
+
+    task = g_task_new (self, NULL, callback, user_data);
+
+    /* our own disabling first */
+    common_voice_enable_disable_unsolicited_events (MM_SHARED_SIMTECH (self),
+                                                    FALSE,
+                                                    (GAsyncReadyCallback) voice_disable_unsolicited_events_ready,
+                                                    task);
+}
+
+/*****************************************************************************/
+/* Enable unsolicited events (Voice interface) */
+
+gboolean
+mm_shared_simtech_voice_enable_unsolicited_events_finish (MMIfaceModemVoice  *self,
+                                                          GAsyncResult       *res,
+                                                          GError            **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+voice_enable_unsolicited_events_ready (MMSharedSimtech *self,
+                                       GAsyncResult      *res,
+                                       GTask             *task)
+{
+    GError *error = NULL;
+
+    if (!common_voice_enable_disable_unsolicited_events_finish (self, res, &error)) {
+        mm_obj_warn (self, "couldn't enable Simtech-specific voice unsolicited events: %s", error->message);
+        g_error_free (error);
+    }
+
+    g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+static void
+parent_voice_enable_unsolicited_events_ready (MMIfaceModemVoice *self,
+                                              GAsyncResult      *res,
+                                              GTask             *task)
+{
+    GError  *error = NULL;
+    Private *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    if (!priv->iface_modem_voice_parent->enable_unsolicited_events_finish (self, res, &error)) {
+        mm_obj_warn (self, "couldn't enable parent voice unsolicited events: %s", error->message);
+        g_error_free (error);
+    }
+
+    /* our own enabling next */
+    common_voice_enable_disable_unsolicited_events (MM_SHARED_SIMTECH (self),
+                                                    TRUE,
+                                                    (GAsyncReadyCallback) voice_enable_unsolicited_events_ready,
+                                                    task);
+}
+
+void
+mm_shared_simtech_voice_enable_unsolicited_events (MMIfaceModemVoice   *self,
+                                                   GAsyncReadyCallback  callback,
+                                                   gpointer             user_data)
+{
+    Private *priv;
+    GTask   *task;
+
+    task = g_task_new (self, NULL, callback, user_data);
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+    g_assert (priv->iface_modem_voice_parent);
+    g_assert (priv->iface_modem_voice_parent->enable_unsolicited_events);
+    g_assert (priv->iface_modem_voice_parent->enable_unsolicited_events_finish);
+
+    /* chain up parent's enable first */
+    priv->iface_modem_voice_parent->enable_unsolicited_events (
+        self,
+        (GAsyncReadyCallback)parent_voice_enable_unsolicited_events_ready,
+        task);
+}
+
+/*****************************************************************************/
+/* Common setup/cleanup voice unsolicited events */
+
+static void
+clcc_urc_received (MMPortSerialAt  *port,
+                   GMatchInfo      *match_info,
+                   MMSharedSimtech *self)
+{
+    gchar  *full;
+    GError *error = NULL;
+    GList  *call_info_list = NULL;
+
+    full = g_match_info_fetch (match_info, 0);
+
+    if (!mm_simtech_parse_clcc_list (full, self, &call_info_list, &error)) {
+        mm_obj_warn (self, "couldn't parse +CLCC list in URC: %s", error->message);
+        g_error_free (error);
+    } else
+        mm_iface_modem_voice_report_all_calls (MM_IFACE_MODEM_VOICE (self), call_info_list);
+
+    mm_simtech_call_info_list_free (call_info_list);
+    g_free (full);
+}
+
+static void
+missed_call_urc_received (MMPortSerialAt  *port,
+                          GMatchInfo      *match_info,
+                          MMSharedSimtech *self)
+{
+    GError *error = NULL;
+    gchar  *details = NULL;
+
+    if (!mm_simtech_parse_missed_call_urc (match_info, &details, &error)) {
+        mm_obj_warn (self, "couldn't parse missed call URC: %s", error->message);
+        g_error_free (error);
+        return;
+    }
+
+    mm_obj_dbg (self, "missed call reported: %s", details);
+    g_free (details);
+}
+
+static void
+voice_call_urc_received (MMPortSerialAt  *port,
+                         GMatchInfo      *match_info,
+                         MMSharedSimtech *self)
+{
+    GError   *error = NULL;
+    gboolean  start_or_stop = FALSE; /* start = TRUE, stop = FALSE */
+    guint     duration = 0;
+
+    if (!mm_simtech_parse_voice_call_urc (match_info, &start_or_stop, &duration, &error)) {
+        mm_obj_warn (self, "couldn't parse voice call URC: %s", error->message);
+        g_error_free (error);
+        return;
+    }
+
+    if (start_or_stop) {
+        mm_obj_dbg (self, "voice call started");
+        return;
+    }
+
+    if (duration) {
+        mm_obj_dbg (self, "voice call finished (duration: %us)", duration);
+        return;
+    }
+
+    mm_obj_dbg (self, "voice call finished");
+}
+
+static void
+cring_urc_received (MMPortSerialAt  *port,
+                    GMatchInfo      *info,
+                    MMSharedSimtech *self)
+{
+    MMCallInfo        call_info;
+    g_autofree gchar *str = NULL;
+
+    /* We could have "VOICE" or "DATA". Now consider only "VOICE" */
+    str = mm_get_string_unquoted_from_match_info (info, 1);
+    mm_obj_dbg (self, "ringing (%s)", str);
+
+    call_info.index     = 0;
+    call_info.direction = MM_CALL_DIRECTION_INCOMING;
+    call_info.state     = MM_CALL_STATE_RINGING_IN;
+    call_info.number    = NULL;
+
+    mm_iface_modem_voice_report_call (MM_IFACE_MODEM_VOICE (self), &call_info);
+}
+
+static void
+rxdtmf_urc_received (MMPortSerialAt  *port,
+                     GMatchInfo      *match_info,
+                     MMSharedSimtech *self)
+{
+    g_autofree gchar *dtmf = NULL;
+
+    dtmf = g_match_info_fetch (match_info, 1);
+    mm_obj_dbg (self, "received DTMF: %s", dtmf);
+    /* call index unknown */
+    mm_iface_modem_voice_received_dtmf (MM_IFACE_MODEM_VOICE (self), 0, dtmf);
+}
+
+static void
+common_voice_setup_cleanup_unsolicited_events (MMSharedSimtech *self,
+                                               gboolean         enable)
+{
+    Private        *priv;
+    MMPortSerialAt *ports[2];
+    guint           i;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    ports[0] = mm_base_modem_peek_port_primary   (MM_BASE_MODEM (self));
+    ports[1] = mm_base_modem_peek_port_secondary (MM_BASE_MODEM (self));
+
+    for (i = 0; i < G_N_ELEMENTS (ports); i++) {
+        if (!ports[i])
+            continue;
+
+        if (priv->clcc_urc_support == FEATURE_SUPPORTED)
+            mm_port_serial_at_add_unsolicited_msg_handler (ports[i],
+                                                           priv->clcc_urc_regex,
+                                                           enable ? (MMPortSerialAtUnsolicitedMsgFn)clcc_urc_received : NULL,
+                                                           enable ? self : NULL,
+                                                           NULL);
+
+        mm_port_serial_at_add_unsolicited_msg_handler (ports[i],
+                                                       priv->voice_call_regex,
+                                                       enable ? (MMPortSerialAtUnsolicitedMsgFn)voice_call_urc_received : NULL,
+                                                       enable ? self : NULL,
+                                                       NULL);
+
+        mm_port_serial_at_add_unsolicited_msg_handler (ports[i],
+                                                       priv->missed_call_regex,
+                                                       enable ? (MMPortSerialAtUnsolicitedMsgFn)missed_call_urc_received : NULL,
+                                                       enable ? self : NULL,
+                                                       NULL);
+
+        mm_port_serial_at_add_unsolicited_msg_handler (ports[i],
+                                                       priv->cring_regex,
+                                                       enable ? (MMPortSerialAtUnsolicitedMsgFn)cring_urc_received : NULL,
+                                                       enable ? self : NULL,
+                                                       NULL);
+
+        mm_port_serial_at_add_unsolicited_msg_handler (ports[i],
+                                                       priv->rxdtmf_regex,
+                                                       enable ? (MMPortSerialAtUnsolicitedMsgFn)rxdtmf_urc_received : NULL,
+                                                       enable ? self : NULL,
+                                                       NULL);
+    }
+}
+
+/*****************************************************************************/
+/* Cleanup unsolicited events (Voice interface) */
+
+gboolean
+mm_shared_simtech_voice_cleanup_unsolicited_events_finish (MMIfaceModemVoice  *self,
+                                                           GAsyncResult       *res,
+                                                           GError            **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+parent_voice_cleanup_unsolicited_events_ready (MMIfaceModemVoice *self,
+                                               GAsyncResult      *res,
+                                               GTask             *task)
+{
+    GError  *error = NULL;
+    Private *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    if (!priv->iface_modem_voice_parent->cleanup_unsolicited_events_finish (self, res, &error)) {
+        mm_obj_warn (self, "couldn't cleanup parent voice unsolicited events: %s", error->message);
+        g_error_free (error);
+    }
+
+    g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+void
+mm_shared_simtech_voice_cleanup_unsolicited_events (MMIfaceModemVoice   *self,
+                                                    GAsyncReadyCallback  callback,
+                                                    gpointer             user_data)
+{
+    Private *priv;
+    GTask   *task;
+
+    task = g_task_new (self, NULL, callback, user_data);
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+    g_assert (priv->iface_modem_voice_parent);
+    g_assert (priv->iface_modem_voice_parent->cleanup_unsolicited_events);
+    g_assert (priv->iface_modem_voice_parent->cleanup_unsolicited_events_finish);
+
+    /* our own cleanup first */
+    common_voice_setup_cleanup_unsolicited_events (MM_SHARED_SIMTECH (self), FALSE);
+
+    /* Chain up parent's cleanup */
+    priv->iface_modem_voice_parent->cleanup_unsolicited_events (
+        self,
+        (GAsyncReadyCallback)parent_voice_cleanup_unsolicited_events_ready,
+        task);
+}
+
+/*****************************************************************************/
+/* Setup unsolicited events (Voice interface) */
+
+gboolean
+mm_shared_simtech_voice_setup_unsolicited_events_finish (MMIfaceModemVoice  *self,
+                                                         GAsyncResult       *res,
+                                                         GError            **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+parent_voice_setup_unsolicited_events_ready (MMIfaceModemVoice *self,
+                                             GAsyncResult      *res,
+                                             GTask             *task)
+{
+    GError  *error = NULL;
+    Private *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    if (!priv->iface_modem_voice_parent->setup_unsolicited_events_finish (self, res, &error)) {
+        mm_obj_warn (self, "couldn't setup parent voice unsolicited events: %s", error->message);
+        g_error_free (error);
+    }
+
+    /* our own setup next */
+    common_voice_setup_cleanup_unsolicited_events (MM_SHARED_SIMTECH (self), TRUE);
+
+    g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+void
+mm_shared_simtech_voice_setup_unsolicited_events (MMIfaceModemVoice   *self,
+                                                  GAsyncReadyCallback  callback,
+                                                  gpointer             user_data)
+{
+    Private *priv;
+    GTask   *task;
+
+    task = g_task_new (self, NULL, callback, user_data);
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+    g_assert (priv->iface_modem_voice_parent);
+    g_assert (priv->iface_modem_voice_parent->setup_unsolicited_events);
+    g_assert (priv->iface_modem_voice_parent->setup_unsolicited_events_finish);
+
+    /* chain up parent's setup first */
+    priv->iface_modem_voice_parent->setup_unsolicited_events (
+        self,
+        (GAsyncReadyCallback)parent_voice_setup_unsolicited_events_ready,
+        task);
+}
+
+/*****************************************************************************/
+/* In-call audio channel setup/cleanup */
+
+gboolean
+mm_shared_simtech_voice_setup_in_call_audio_channel_finish (MMIfaceModemVoice  *self,
+                                                            GAsyncResult       *res,
+                                                            MMPort            **audio_port,   /* optional */
+                                                            MMCallAudioFormat **audio_format, /* optional */
+                                                            GError            **error)
+{
+    Private *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    if (!g_task_propagate_boolean (G_TASK (res), error))
+        return FALSE;
+
+    if (audio_format)
+        *audio_format = NULL;
+
+    if (audio_port) {
+        if (priv->cpcmreg_support == FEATURE_SUPPORTED)
+            *audio_port = MM_PORT (mm_base_modem_get_port_audio (MM_BASE_MODEM (self)));
+        else
+            *audio_port = NULL;
+    }
+
+    return TRUE;
+}
+
+gboolean
+mm_shared_simtech_voice_cleanup_in_call_audio_channel_finish (MMIfaceModemVoice  *self,
+                                                              GAsyncResult       *res,
+                                                              GError            **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+cpcmreg_set_ready (MMBaseModem  *self,
+                   GAsyncResult *res,
+                   GTask        *task)
+{
+    GError *error = NULL;
+
+    if (!mm_base_modem_at_command_finish (self, res, &error))
+        g_task_return_error (task, error);
+    else
+        g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+static void
+common_setup_cleanup_in_call_audio_channel (MMSharedSimtech     *self,
+                                            gboolean             setup,
+                                            GAsyncReadyCallback  callback,
+                                            gpointer             user_data)
+{
+    GTask   *task;
+    Private *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    task = g_task_new (self, NULL, callback, user_data);
+
+    /* Do nothing if CPCMREG isn't supported */
+    if (priv->cpcmreg_support != FEATURE_SUPPORTED) {
+        g_task_return_boolean (task, TRUE);
+        g_object_unref (task);
+        return;
+    }
+
+    mm_base_modem_at_command (MM_BASE_MODEM (self),
+                              setup ? "+CPCMREG=1" : "+CPCMREG=0",
+                              3,
+                              FALSE,
+                              (GAsyncReadyCallback) cpcmreg_set_ready,
+                              task);
+}
+
+void
+mm_shared_simtech_voice_setup_in_call_audio_channel (MMIfaceModemVoice   *self,
+                                                     GAsyncReadyCallback  callback,
+                                                     gpointer             user_data)
+{
+    common_setup_cleanup_in_call_audio_channel (MM_SHARED_SIMTECH (self), TRUE, callback, user_data);
+}
+
+void
+mm_shared_simtech_voice_cleanup_in_call_audio_channel (MMIfaceModemVoice   *self,
+                                                       GAsyncReadyCallback  callback,
+                                                       gpointer             user_data)
+{
+    common_setup_cleanup_in_call_audio_channel (MM_SHARED_SIMTECH (self), FALSE, callback, user_data);
+}
+
+/*****************************************************************************/
+/* Check if Voice supported (Voice interface) */
+
+gboolean
+mm_shared_simtech_voice_check_support_finish (MMIfaceModemVoice  *self,
+                                              GAsyncResult       *res,
+                                              GError            **error)
+{
+    return g_task_propagate_boolean (G_TASK (res), error);
+}
+
+static void
+cpcmreg_format_check_ready (MMBroadbandModem *self,
+                            GAsyncResult     *res,
+                            GTask            *task)
+{
+    Private *priv;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    priv->cpcmreg_support = (mm_base_modem_at_command_finish (MM_BASE_MODEM (self), res, NULL) ?
+                             FEATURE_SUPPORTED : FEATURE_NOT_SUPPORTED);
+    mm_obj_dbg (self, "modem %s USB audio control", (priv->cpcmreg_support == FEATURE_SUPPORTED) ? "supports" : "doesn't support");
+
+    g_task_return_boolean (task, TRUE);
+    g_object_unref (task);
+}
+
+static void
+clcc_format_check_ready (MMBroadbandModem *self,
+                         GAsyncResult     *res,
+                         GTask            *task)
+{
+    Private     *priv;
+    GError      *error = NULL;
+    const gchar *response;
+    gboolean     clcc_urc_supported = FALSE;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+
+    response = mm_base_modem_at_command_finish (MM_BASE_MODEM (self), res, NULL);
+    if (response && !mm_simtech_parse_clcc_test (response, &clcc_urc_supported, &error)) {
+        mm_obj_dbg (self, "failed checking CLCC URC support: %s", error->message);
+        g_clear_error (&error);
+    }
+
+    priv->clcc_urc_support = (clcc_urc_supported ? FEATURE_SUPPORTED : FEATURE_NOT_SUPPORTED);
+    mm_obj_dbg (self, "modem %s +CLCC URCs", (priv->clcc_urc_support == FEATURE_SUPPORTED) ? "supports" : "doesn't support");
+
+    /* If +CLCC URC supported we won't need polling in the parent */
+    g_object_set (self,
+                  MM_IFACE_MODEM_VOICE_PERIODIC_CALL_LIST_CHECK_DISABLED, (priv->clcc_urc_support == FEATURE_SUPPORTED),
+                  NULL);
+
+    mm_base_modem_at_command (MM_BASE_MODEM (self),
+                              "+CPCMREG=?",
+                              3,
+                              TRUE,
+                              (GAsyncReadyCallback) cpcmreg_format_check_ready,
+                              task);
+}
+
+static void
+parent_voice_check_support_ready (MMIfaceModemVoice *self,
+                                  GAsyncResult      *res,
+                                  GTask             *task)
+{
+    Private *priv;
+    GError  *error = NULL;
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+    if (!priv->iface_modem_voice_parent->check_support_finish (self, res, &error)) {
+        g_task_return_error (task, error);
+        g_object_unref (task);
+        return;
+    }
+
+    /* voice is supported, check if +CLCC URCs are available */
+    mm_base_modem_at_command (MM_BASE_MODEM (self),
+                              "+CLCC=?",
+                              3,
+                              TRUE,
+                              (GAsyncReadyCallback) clcc_format_check_ready,
+                              task);
+}
+
+void
+mm_shared_simtech_voice_check_support (MMIfaceModemVoice   *self,
+                                       GAsyncReadyCallback  callback,
+                                       gpointer             user_data)
+{
+    Private *priv;
+    GTask   *task;
+
+    task = g_task_new (self, NULL, callback, user_data);
+
+    priv = get_private (MM_SHARED_SIMTECH (self));
+    g_assert (priv->iface_modem_voice_parent);
+    g_assert (priv->iface_modem_voice_parent->check_support);
+    g_assert (priv->iface_modem_voice_parent->check_support_finish);
+
+    /* chain up parent's setup first */
+    priv->iface_modem_voice_parent->check_support (
+        self,
+        (GAsyncReadyCallback)parent_voice_check_support_ready,
+        task);
+}
+
+/*****************************************************************************/
+
+static void
+shared_simtech_init (gpointer g_iface)
+{
+}
+
+GType
+mm_shared_simtech_get_type (void)
+{
+    static GType shared_simtech_type = 0;
+
+    if (!G_UNLIKELY (shared_simtech_type)) {
+        static const GTypeInfo info = {
+            sizeof (MMSharedSimtech),  /* class_size */
+            shared_simtech_init,       /* base_init */
+            NULL,                  /* base_finalize */
+        };
+
+        shared_simtech_type = g_type_register_static (G_TYPE_INTERFACE, "MMSharedSimtech", &info, 0);
+        g_type_interface_add_prerequisite (shared_simtech_type, MM_TYPE_IFACE_MODEM_LOCATION);
+    }
+
+    return shared_simtech_type;
+}
diff --git a/src/plugins/simtech/mm-shared-simtech.h b/src/plugins/simtech/mm-shared-simtech.h
new file mode 100644
index 00000000..37a221ca
--- /dev/null
+++ b/src/plugins/simtech/mm-shared-simtech.h
@@ -0,0 +1,129 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2019 Aleksander Morgado <aleksander@aleksander.es>
+ */
+
+#ifndef MM_SHARED_SIMTECH_H
+#define MM_SHARED_SIMTECH_H
+
+#include <glib-object.h>
+#include <gio/gio.h>
+
+#define _LIBMM_INSIDE_MM
+#include <libmm-glib.h>
+
+#include "mm-broadband-modem.h"
+#include "mm-iface-modem.h"
+#include "mm-iface-modem-location.h"
+#include "mm-iface-modem-voice.h"
+
+#define MM_TYPE_SHARED_SIMTECH               (mm_shared_simtech_get_type ())
+#define MM_SHARED_SIMTECH(obj)               (G_TYPE_CHECK_INSTANCE_CAST ((obj), MM_TYPE_SHARED_SIMTECH, MMSharedSimtech))
+#define MM_IS_SHARED_SIMTECH(obj)            (G_TYPE_CHECK_INSTANCE_TYPE ((obj), MM_TYPE_SHARED_SIMTECH))
+#define MM_SHARED_SIMTECH_GET_INTERFACE(obj) (G_TYPE_INSTANCE_GET_INTERFACE ((obj), MM_TYPE_SHARED_SIMTECH, MMSharedSimtech))
+
+typedef struct _MMSharedSimtech MMSharedSimtech;
+
+struct _MMSharedSimtech {
+    GTypeInterface g_iface;
+
+    /* Peek location interface of the parent class of the object */
+    MMIfaceModemLocation *  (* peek_parent_location_interface) (MMSharedSimtech *self);
+
+    /* Peek voice interface of the parent class of the object */
+    MMIfaceModemVoice *  (* peek_parent_voice_interface) (MMSharedSimtech *self);
+};
+
+GType mm_shared_simtech_get_type (void);
+
+/*****************************************************************************/
+/* Location interface */
+
+void                  mm_shared_simtech_location_load_capabilities        (MMIfaceModemLocation  *self,
+                                                                           GAsyncReadyCallback    callback,
+                                                                           gpointer               user_data);
+MMModemLocationSource mm_shared_simtech_location_load_capabilities_finish (MMIfaceModemLocation  *self,
+                                                                           GAsyncResult          *res,
+                                                                           GError               **error);
+
+void                  mm_shared_simtech_enable_location_gathering         (MMIfaceModemLocation   *self,
+                                                                           MMModemLocationSource   source,
+                                                                           GAsyncReadyCallback     callback,
+                                                                           gpointer                user_data);
+gboolean              mm_shared_simtech_enable_location_gathering_finish  (MMIfaceModemLocation   *self,
+                                                                           GAsyncResult           *res,
+                                                                           GError                **error);
+
+void                  mm_shared_simtech_disable_location_gathering        (MMIfaceModemLocation   *self,
+                                                                           MMModemLocationSource   source,
+                                                                           GAsyncReadyCallback     callback,
+                                                                           gpointer                user_data);
+gboolean              mm_shared_simtech_disable_location_gathering_finish (MMIfaceModemLocation   *self,
+                                                                           GAsyncResult           *res,
+                                                                           GError                **error);
+
+
+/*****************************************************************************/
+/* Voice interface */
+
+void     mm_shared_simtech_voice_check_support                     (MMIfaceModemVoice   *self,
+                                                                    GAsyncReadyCallback  callback,
+                                                                    gpointer             user_data);
+gboolean mm_shared_simtech_voice_check_support_finish              (MMIfaceModemVoice    *self,
+                                                                    GAsyncResult         *res,
+                                                                    GError              **error);
+
+void     mm_shared_simtech_voice_setup_unsolicited_events          (MMIfaceModemVoice    *self,
+                                                                    GAsyncReadyCallback   callback,
+                                                                    gpointer              user_data);
+gboolean mm_shared_simtech_voice_setup_unsolicited_events_finish   (MMIfaceModemVoice    *self,
+                                                                    GAsyncResult         *res,
+                                                                    GError              **error);
+
+void     mm_shared_simtech_voice_cleanup_unsolicited_events        (MMIfaceModemVoice    *self,
+                                                                    GAsyncReadyCallback   callback,
+                                                                    gpointer              user_data);
+gboolean mm_shared_simtech_voice_cleanup_unsolicited_events_finish (MMIfaceModemVoice    *self,
+                                                                    GAsyncResult         *res,
+                                                                    GError              **error);
+
+void     mm_shared_simtech_voice_enable_unsolicited_events         (MMIfaceModemVoice    *self,
+                                                                    GAsyncReadyCallback   callback,
+                                                                    gpointer              user_data);
+gboolean mm_shared_simtech_voice_enable_unsolicited_events_finish  (MMIfaceModemVoice    *self,
+                                                                    GAsyncResult         *res,
+                                                                    GError              **error);
+
+void     mm_shared_simtech_voice_disable_unsolicited_events        (MMIfaceModemVoice    *self,
+                                                                    GAsyncReadyCallback   callback,
+                                                                    gpointer              user_data);
+gboolean mm_shared_simtech_voice_disable_unsolicited_events_finish (MMIfaceModemVoice    *self,
+                                                                    GAsyncResult         *res,
+                                                                    GError              **error);
+
+void     mm_shared_simtech_voice_setup_in_call_audio_channel          (MMIfaceModemVoice    *self,
+                                                                       GAsyncReadyCallback   callback,
+                                                                       gpointer              user_data);
+gboolean mm_shared_simtech_voice_setup_in_call_audio_channel_finish   (MMIfaceModemVoice    *self,
+                                                                       GAsyncResult         *res,
+                                                                       MMPort              **audio_port,   /* optional */
+                                                                       MMCallAudioFormat   **audio_format, /* optional */
+                                                                       GError              **error);
+void     mm_shared_simtech_voice_cleanup_in_call_audio_channel        (MMIfaceModemVoice    *self,
+                                                                       GAsyncReadyCallback   callback,
+                                                                       gpointer              user_data);
+gboolean mm_shared_simtech_voice_cleanup_in_call_audio_channel_finish (MMIfaceModemVoice    *self,
+                                                                       GAsyncResult         *res,
+                                                                       GError              **error);
+
+#endif  /* MM_SHARED_SIMTECH_H */
diff --git a/src/plugins/simtech/tests/test-modem-helpers-simtech.c b/src/plugins/simtech/tests/test-modem-helpers-simtech.c
new file mode 100644
index 00000000..ba6532cc
--- /dev/null
+++ b/src/plugins/simtech/tests/test-modem-helpers-simtech.c
@@ -0,0 +1,324 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2019 Aleksander Morgado <aleksander@aleksander.es>
+ */
+
+#include <glib.h>
+#include <glib-object.h>
+#include <locale.h>
+
+#include <ModemManager.h>
+#define _LIBMM_INSIDE_MM
+#include <libmm-glib.h>
+
+#include "mm-log-test.h"
+#include "mm-modem-helpers.h"
+#include "mm-modem-helpers-simtech.h"
+
+/*****************************************************************************/
+/* Test +CLCC URCs */
+
+static void
+common_test_clcc_urc (const gchar      *urc,
+                      const MMCallInfo *expected_call_info_list,
+                      guint             expected_call_info_list_size)
+{
+    g_autoptr(GRegex)      clcc_regex = NULL;
+    g_autoptr(GMatchInfo)  match_info = NULL;
+    g_autofree gchar      *str = NULL;
+    GError                *error = NULL;
+    GList                 *call_info_list = NULL;
+    GList                 *l;
+    gboolean               result;
+
+    clcc_regex = mm_simtech_get_clcc_urc_regex ();
+
+    /* Same matching logic as done in MMSerialPortAt when processing URCs! */
+    result = g_regex_match_full (clcc_regex, urc, -1, 0, 0, &match_info, &error);
+    g_assert_no_error (error);
+    g_assert (result);
+
+    /* read full matched content */
+    str = g_match_info_fetch (match_info, 0);
+    g_assert (str);
+
+    result = mm_simtech_parse_clcc_list (str, NULL, &call_info_list, &error);
+    g_assert_no_error (error);
+    g_assert (result);
+
+    g_debug ("found %u calls", g_list_length (call_info_list));
+
+    if (expected_call_info_list) {
+        g_assert (call_info_list);
+        g_assert_cmpuint (g_list_length (call_info_list), ==, expected_call_info_list_size);
+    } else
+        g_assert (!call_info_list);
+
+    for (l = call_info_list; l; l = g_list_next (l)) {
+        const MMCallInfo *call_info = (const MMCallInfo *)(l->data);
+        gboolean                   found = FALSE;
+        guint                      i;
+
+        g_debug ("call at index %u: direction %s, state %s, number %s",
+                 call_info->index,
+                 mm_call_direction_get_string (call_info->direction),
+                 mm_call_state_get_string (call_info->state),
+                 call_info->number ? call_info->number : "n/a");
+
+        for (i = 0; !found && i < expected_call_info_list_size; i++)
+            found = ((call_info->index == expected_call_info_list[i].index) &&
+                     (call_info->direction  == expected_call_info_list[i].direction) &&
+                     (call_info->state  == expected_call_info_list[i].state) &&
+                     (g_strcmp0 (call_info->number, expected_call_info_list[i].number) == 0));
+
+        g_assert (found);
+    }
+
+    mm_simtech_call_info_list_free (call_info_list);
+}
+
+static void
+test_clcc_urc_single (void)
+{
+    static const MMCallInfo expected_call_info_list[] = {
+        { 1, MM_CALL_DIRECTION_INCOMING, MM_CALL_STATE_ACTIVE, (gchar *) "123456789" }
+    };
+
+    const gchar *urc =
+        "\r\n+CLCC: 1,1,0,0,0,\"123456789\",161"
+        "\r\n";
+
+    common_test_clcc_urc (urc, expected_call_info_list, G_N_ELEMENTS (expected_call_info_list));
+}
+
+static void
+test_clcc_urc_multiple (void)
+{
+    static const MMCallInfo expected_call_info_list[] = {
+        { 1, MM_CALL_DIRECTION_INCOMING, MM_CALL_STATE_ACTIVE,  NULL                  },
+        { 2, MM_CALL_DIRECTION_INCOMING, MM_CALL_STATE_ACTIVE,  (gchar *) "123456789" },
+        { 3, MM_CALL_DIRECTION_INCOMING, MM_CALL_STATE_ACTIVE,  (gchar *) "987654321" },
+    };
+
+    const gchar *urc =
+        "\r\n+CLCC: 1,1,0,0,0" /* number unknown */
+        "\r\n+CLCC: 2,1,0,0,0,\"123456789\",161"
+        "\r\n+CLCC: 3,1,0,0,0,\"987654321\",161,\"Alice\""
+        "\r\n";
+
+    common_test_clcc_urc (urc, expected_call_info_list, G_N_ELEMENTS (expected_call_info_list));
+}
+
+static void
+test_clcc_urc_complex (void)
+{
+    static const MMCallInfo expected_call_info_list[] = {
+        { 1, MM_CALL_DIRECTION_INCOMING, MM_CALL_STATE_ACTIVE,  (gchar *) "123456789" },
+        { 2, MM_CALL_DIRECTION_INCOMING, MM_CALL_STATE_WAITING, (gchar *) "987654321" },
+    };
+
+    const gchar *urc =
+        "\r\n^CIEV: 1,0" /* some different URC before our match */
+        "\r\n+CLCC: 1,1,0,0,0,\"123456789\",161"
+        "\r\n+CLCC: 2,1,5,0,0,\"987654321\",161"
+        "\r\n^CIEV: 1,0" /* some different URC after our match */
+        "\r\n";
+
+    common_test_clcc_urc (urc, expected_call_info_list, G_N_ELEMENTS (expected_call_info_list));
+}
+
+/*****************************************************************************/
+
+static void
+common_test_voice_call_urc (const gchar *urc,
+                            gboolean     expected_start_or_stop,
+                            guint        expected_duration)
+{
+    g_autoptr(GRegex)      voice_call_regex = NULL;
+    g_autoptr(GMatchInfo)  match_info = NULL;
+    GError                *error = NULL;
+    gboolean               start_or_stop = FALSE; /* start = TRUE, stop = FALSE */
+    guint                  duration = 0;
+    gboolean               result;
+
+    voice_call_regex = mm_simtech_get_voice_call_urc_regex ();
+
+    /* Same matching logic as done in MMSerialPortAt when processing URCs! */
+    result = g_regex_match_full (voice_call_regex, urc, -1, 0, 0, &match_info, &error);
+    g_assert_no_error (error);
+    g_assert (result);
+
+    result = mm_simtech_parse_voice_call_urc (match_info, &start_or_stop, &duration, &error);
+    g_assert_no_error (error);
+    g_assert (result);
+
+    g_assert_cmpuint (expected_start_or_stop, ==, start_or_stop);
+    g_assert_cmpuint (expected_duration, ==, duration);
+}
+
+static void
+test_voice_call_begin_urc (void)
+{
+    common_test_voice_call_urc ("\r\nVOICE CALL: BEGIN\r\n", TRUE, 0);
+}
+
+static void
+test_voice_call_end_urc (void)
+{
+    common_test_voice_call_urc ("\r\nVOICE CALL: END\r\n", FALSE, 0);
+}
+
+static void
+test_voice_call_end_duration_urc (void)
+{
+    common_test_voice_call_urc ("\r\nVOICE CALL: END: 000041\r\n", FALSE, 41);
+}
+
+/*****************************************************************************/
+
+static void
+common_test_missed_call_urc (const gchar *urc,
+                             const gchar *expected_details)
+{
+    g_autoptr(GRegex)      missed_call_regex = NULL;
+    g_autoptr(GMatchInfo)  match_info = NULL;
+    g_autofree gchar      *details = NULL;
+    GError                *error = NULL;
+    gboolean               result;
+
+    missed_call_regex = mm_simtech_get_missed_call_urc_regex ();
+
+    /* Same matching logic as done in MMSerialPortAt when processing URCs! */
+    result = g_regex_match_full (missed_call_regex, urc, -1, 0, 0, &match_info, &error);
+    g_assert_no_error (error);
+    g_assert (result);
+
+    result = mm_simtech_parse_missed_call_urc (match_info, &details, &error);
+    g_assert_no_error (error);
+    g_assert (result);
+
+    g_assert_cmpstr (expected_details, ==, details);
+}
+
+static void
+test_missed_call_urc (void)
+{
+    common_test_missed_call_urc ("\r\nMISSED_CALL: 11:01AM 07712345678\r\n", "11:01AM 07712345678");
+}
+
+/*****************************************************************************/
+
+static void
+common_test_cring_urc (const gchar *urc,
+                       const gchar *expected_type)
+{
+    g_autoptr(GRegex)      cring_regex = NULL;
+    g_autoptr(GMatchInfo)  match_info = NULL;
+    g_autofree gchar      *type = NULL;
+    GError                *error = NULL;
+    gboolean               result;
+
+    cring_regex = mm_simtech_get_cring_urc_regex ();
+
+    /* Same matching logic as done in MMSerialPortAt when processing URCs! */
+    result = g_regex_match_full (cring_regex, urc, -1, 0, 0, &match_info, &error);
+    g_assert_no_error (error);
+    g_assert (result);
+
+    type = g_match_info_fetch (match_info, 1);
+    g_assert (type);
+
+    g_assert_cmpstr (type, ==, expected_type);
+}
+
+static void
+test_cring_urc_two_crs (void)
+{
+    common_test_cring_urc ("\r\r\n+CRING: VOICE\r\r\n", "VOICE");
+}
+
+static void
+test_cring_urc_one_cr (void)
+{
+    common_test_cring_urc ("\r\n+CRING: VOICE\r\n", "VOICE");
+}
+
+/*****************************************************************************/
+
+static void
+common_test_rxdtmf_urc (const gchar *urc,
+                        const gchar *expected_str)
+{
+    g_autoptr(GRegex)      rxdtmf_regex = NULL;
+    g_autoptr(GMatchInfo)  match_info = NULL;
+    g_autofree gchar      *type = NULL;
+    GError                *error = NULL;
+    gboolean               result;
+
+    rxdtmf_regex = mm_simtech_get_rxdtmf_urc_regex ();
+
+    /* Same matching logic as done in MMSerialPortAt when processing URCs! */
+    result = g_regex_match_full (rxdtmf_regex, urc, -1, 0, 0, &match_info, &error);
+    g_assert_no_error (error);
+    g_assert (result);
+
+    type = g_match_info_fetch (match_info, 1);
+    g_assert (type);
+
+    g_assert_cmpstr (type, ==, expected_str);
+}
+
+static void
+test_rxdtmf_urc_two_crs (void)
+{
+    common_test_rxdtmf_urc ("\r\r\n+RXDTMF: 8\r\r\n", "8");
+    common_test_rxdtmf_urc ("\r\r\n+RXDTMF: *\r\r\n", "*");
+    common_test_rxdtmf_urc ("\r\r\n+RXDTMF: #\r\r\n", "#");
+    common_test_rxdtmf_urc ("\r\r\n+RXDTMF: A\r\r\n", "A");
+}
+
+static void
+test_rxdtmf_urc_one_cr (void)
+{
+    common_test_rxdtmf_urc ("\r\n+RXDTMF: 8\r\n", "8");
+    common_test_rxdtmf_urc ("\r\n+RXDTMF: *\r\n", "*");
+    common_test_rxdtmf_urc ("\r\n+RXDTMF: #\r\n", "#");
+    common_test_rxdtmf_urc ("\r\n+RXDTMF: A\r\n", "A");
+}
+
+/*****************************************************************************/
+
+int main (int argc, char **argv)
+{
+    setlocale (LC_ALL, "");
+
+    g_test_init (&argc, &argv, NULL);
+
+    g_test_add_func ("/MM/simtech/clcc/urc/single",   test_clcc_urc_single);
+    g_test_add_func ("/MM/simtech/clcc/urc/multiple", test_clcc_urc_multiple);
+    g_test_add_func ("/MM/simtech/clcc/urc/complex",  test_clcc_urc_complex);
+
+    g_test_add_func ("/MM/simtech/voicecall/urc/begin",        test_voice_call_begin_urc);
+    g_test_add_func ("/MM/simtech/voicecall/urc/end",          test_voice_call_end_urc);
+    g_test_add_func ("/MM/simtech/voicecall/urc/end-duration", test_voice_call_end_duration_urc);
+
+    g_test_add_func ("/MM/simtech/missedcall/urc", test_missed_call_urc);
+
+    g_test_add_func ("/MM/simtech/cring/urc/two-crs", test_cring_urc_two_crs);
+    g_test_add_func ("/MM/simtech/cring/urc/one-cr", test_cring_urc_one_cr);
+
+    g_test_add_func ("/MM/simtech/rxdtmf/urc/two-crs", test_rxdtmf_urc_two_crs);
+    g_test_add_func ("/MM/simtech/rxdtmf/urc/one-cr", test_rxdtmf_urc_one_cr);
+
+    return g_test_run ();
+}