diff --git a/meson.build b/meson.build
index cb0d72e..069147b 100644
--- a/meson.build
+++ b/meson.build
@@ -8,7 +8,7 @@
 project (
   'eg25manager',
   'c',
-  version : '0.1.1',
+  version : '0.1.2',
   license : 'GPLv3+',
   meson_version : '>= 0.50.0',
   default_options :
diff --git a/src/at.c b/src/at.c
index e035d34..39a857a 100644
--- a/src/at.c
+++ b/src/at.c
@@ -80,8 +80,7 @@ static gboolean send_at_command(struct EG25Manager *manager)
         else
             manager->modem_state = EG25_STATE_CONFIGURED;
     } else if (manager->modem_state == EG25_STATE_SUSPENDING) {
-        g_message("suspend sequence is over, drop inhibitor");
-        suspend_inhibit(manager, FALSE);
+        modem_suspend_post(manager);
     } else if (manager->modem_state == EG25_STATE_RESETTING) {
         manager->modem_state = EG25_STATE_POWERED;
     }
@@ -122,7 +121,7 @@ static void retry_at_command(struct EG25Manager *manager)
         g_critical("Command %s retried %d times, aborting...", at_cmd->cmd, at_cmd->retries);
         next_at_command(manager);
     } else {
-        g_timeout_add_seconds(3, G_SOURCE_FUNC(send_at_command), manager);
+        g_timeout_add(500, G_SOURCE_FUNC(send_at_command), manager);
     }
 }
 
@@ -269,14 +268,18 @@ void at_sequence_configure(struct EG25Manager *manager)
         append_at_command(manager, "QCFG", "apready", NULL, "1,0,500");
     }
     append_at_command(manager, "QURCCFG", "urcport", NULL, "\"usbat\"");
-    append_at_command(manager, "QGPS", NULL, NULL, "1");
+    if (manager->manage_gnss)
+        append_at_command(manager, "QGPS", NULL, NULL, "1");
     append_at_command(manager, "QSCLK", NULL, "1", NULL);
+    // Make sure URC cache is disabled
+    append_at_command(manager, "QCFG", "urc/cache", "0", NULL);
     send_at_command(manager);
 }
 
 void at_sequence_suspend(struct EG25Manager *manager)
 {
-    append_at_command(manager, "QGPSEND", NULL, NULL, NULL);
+    if (manager->manage_gnss)
+        append_at_command(manager, "QGPSEND", NULL, NULL, NULL);
     append_at_command(manager, "QCFG", "urc/cache", "1", NULL);
     send_at_command(manager);
 }
@@ -284,7 +287,8 @@ void at_sequence_suspend(struct EG25Manager *manager)
 void at_sequence_resume(struct EG25Manager *manager)
 {
     append_at_command(manager, "QCFG", "urc/cache", "0", NULL);
-    append_at_command(manager, "QGPS", NULL, "1", NULL);
+    if (manager->manage_gnss)
+        append_at_command(manager, "QGPS", NULL, "1", NULL);
     send_at_command(manager);
 }
 
diff --git a/src/manager.c b/src/manager.c
index bc08ddb..6445e0f 100644
--- a/src/manager.c
+++ b/src/manager.c
@@ -121,7 +121,7 @@ static gboolean modem_reset_done(struct EG25Manager* manager)
 
 void modem_reset(struct EG25Manager *manager)
 {
-    int fd, ret, len = strlen(manager->modem_usb_id);
+    int fd, ret, len;
 
     if (manager->reset_timer)
         return;
@@ -131,6 +131,13 @@ void modem_reset(struct EG25Manager *manager)
         manager->suspend_timer = 0;
     }
 
+    if (!manager->modem_usb_id) {
+        g_warning("Unknown modem USB ID");
+        goto error;
+    }
+
+    len = strlen(manager->modem_usb_id);
+
     manager->modem_state = EG25_STATE_RESETTING;
 
     fd = open("/sys/bus/usb/drivers/usb/unbind", O_WRONLY);
@@ -162,10 +169,16 @@ error:
     at_sequence_reset(manager);
 }
 
-void modem_suspend(struct EG25Manager *manager)
+void modem_suspend_pre(struct EG25Manager *manager)
+{
+    at_sequence_suspend(manager);
+}
+
+void modem_suspend_post(struct EG25Manager *manager)
 {
     gpio_sequence_suspend(manager);
-    at_sequence_suspend(manager);
+    g_message("suspend sequence is over, drop inhibitor");
+    suspend_inhibit(manager, FALSE);
 }
 
 void modem_resume_pre(struct EG25Manager *manager)
@@ -180,14 +193,27 @@ void modem_resume_post(struct EG25Manager *manager)
 
 int main(int argc, char *argv[])
 {
+    g_autoptr(GOptionContext) opt_context = NULL;
+    g_autoptr(GError) err = NULL;
     struct EG25Manager manager;
     char compatible[32];
     int fd, ret;
+    const GOptionEntry options[] = {
+        { "gnss", 'g', 0, G_OPTION_ARG_NONE, &manager.manage_gnss, "Manage the GNSS feature.", NULL },
+        { NULL, 0, 0, G_OPTION_ARG_NONE, NULL, NULL, NULL }
+    };
 
     memset(&manager, 0, sizeof(manager));
     manager.at_fd = -1;
     manager.suspend_inhibit_fd = -1;
 
+    opt_context = g_option_context_new ("- Power management for the Quectel EG25 modem");
+    g_option_context_add_main_entries (opt_context, options, NULL);
+    if (!g_option_context_parse (opt_context, &argc, &argv, &err)) {
+        g_warning ("%s", err->message);
+        return 1;
+    }
+
     manager.loop = g_main_loop_new(NULL, FALSE);
 
     fd = open("/proc/device-tree/compatible", O_RDONLY);
diff --git a/src/manager.h b/src/manager.h
index c51f32f..f6351be 100644
--- a/src/manager.h
+++ b/src/manager.h
@@ -28,6 +28,7 @@ enum EG25State {
 struct EG25Manager {
     GMainLoop *loop;
     guint reset_timer;
+    gboolean manage_gnss;
 
     int at_fd;
     guint at_source;
@@ -54,7 +55,8 @@ struct EG25Manager {
 
 void modem_configure(struct EG25Manager *data);
 void modem_reset(struct EG25Manager *data);
-void modem_suspend(struct EG25Manager *data);
+void modem_suspend_pre(struct EG25Manager *data);
+void modem_suspend_post(struct EG25Manager *data);
 void modem_resume_pre(struct EG25Manager *data);
 void modem_resume_post(struct EG25Manager *data);
 void modem_update_state(struct EG25Manager *data, MMModemState state);
diff --git a/src/suspend.c b/src/suspend.c
index 2e1301e..6d34594 100644
--- a/src/suspend.c
+++ b/src/suspend.c
@@ -94,7 +94,7 @@ static void signal_cb(GDBusProxy *proxy,
     if (is_about_to_suspend) {
         g_message("system is about to suspend");
         manager->modem_state = EG25_STATE_SUSPENDING;
-        modem_suspend(manager);
+        modem_suspend_pre(manager);
     } else {
         g_message("system is resuming");
         take_inhibitor(manager);
diff --git a/src/udev.c b/src/udev.c
index acf10f8..1c5ebd8 100644
--- a/src/udev.c
+++ b/src/udev.c
@@ -12,7 +12,7 @@ static void udev_event_cb(GUdevClient *client, gchar *action, GUdevDevice *devic
 {
     struct EG25Manager *manager = data;
 
-    if (strcmp(action, "unbind") != 0 || manager->modem_state == EG25_STATE_RESETTING)
+    if (strcmp(action, "unbind") != 0 || manager->modem_state == EG25_STATE_RESETTING || !manager->modem_usb_id)
         return;
 
     if (strncmp(g_udev_device_get_name(device), manager->modem_usb_id, strlen(manager->modem_usb_id)) == 0 &&