diff -Nru modemmanager-1.4.12/debian/changelog modemmanager-1.4.12/debian/changelog
--- modemmanager-1.4.12/debian/changelog	2015-11-04 19:48:16.000000000 +0800
+++ modemmanager-1.4.12/debian/changelog	2017-11-29 16:16:08.000000000 +0800
@@ -1,3 +1,10 @@
+modemmanager (1.4.12-1ubuntu2) xenial; urgency=medium
+
+  * Non-maintainer upload.
+  * Set Dell DW5818/5819 as forbidden devices of Gobi 
+
+ -- Robert Liu <robert.liu@canonical.com>  Wed, 29 Nov 2017 16:10:50 +0800
+
 modemmanager (1.4.12-1ubuntu1) xenial; urgency=medium
 
   * Resynchronize on Debian, remaining changes
diff -Nru modemmanager-1.4.12/debian/patches/gobi-set-dell-modules-as-forbidden-devices.patch modemmanager-1.4.12/debian/patches/gobi-set-dell-modules-as-forbidden-devices.patch
--- modemmanager-1.4.12/debian/patches/gobi-set-dell-modules-as-forbidden-devices.patch	1970-01-01 08:00:00.000000000 +0800
+++ modemmanager-1.4.12/debian/patches/gobi-set-dell-modules-as-forbidden-devices.patch	2017-11-29 16:11:49.000000000 +0800
@@ -0,0 +1,32 @@
+Index: modemmanager-1.4.12/plugins/gobi/mm-plugin-gobi.c
+===================================================================
+--- modemmanager-1.4.12.orig/plugins/gobi/mm-plugin-gobi.c
++++ modemmanager-1.4.12/plugins/gobi/mm-plugin-gobi.c
+@@ -69,15 +69,21 @@ mm_plugin_create (void)
+ {
+     static const gchar *subsystems[] = { "tty", "net", "usb", NULL };
+     static const gchar *drivers[] = { "qcserial", NULL };
++    static const mm_uint16_pair forbidden_products[] = { { 0x413c, 0x81d1 }, /* Dell Wireless DW5818 (Sierra MC7455) */
++                                                         { 0x413c, 0x81d2 }, /* Dell Wireless DW5818 (Sierra MC7455) */
++                                                         { 0x413c, 0x81cf }, /* Dell Wireless DW5819 (Sierra MC7430) */
++                                                         { 0x413c, 0x81d0 }, /* Dell Wireless DW5819 (Sierra MC7430) */
++                                                         { 0, 0 } };
+ 
+     return MM_PLUGIN (
+         g_object_new (MM_TYPE_PLUGIN_GOBI,
+-                      MM_PLUGIN_NAME,               "Gobi",
+-                      MM_PLUGIN_ALLOWED_SUBSYSTEMS, subsystems,
+-                      MM_PLUGIN_ALLOWED_DRIVERS,    drivers,
+-                      MM_PLUGIN_ALLOWED_AT,         TRUE,
+-                      MM_PLUGIN_ALLOWED_QCDM,       TRUE,
+-                      MM_PLUGIN_ALLOWED_QMI,        TRUE,
++                      MM_PLUGIN_NAME,                  "Gobi",
++                      MM_PLUGIN_ALLOWED_SUBSYSTEMS,    subsystems,
++                      MM_PLUGIN_FORBIDDEN_PRODUCT_IDS, forbidden_products,
++                      MM_PLUGIN_ALLOWED_DRIVERS,       drivers,
++                      MM_PLUGIN_ALLOWED_AT,            TRUE,
++                      MM_PLUGIN_ALLOWED_QCDM,          TRUE,
++                      MM_PLUGIN_ALLOWED_QMI,           TRUE,
+                       NULL));
+ }
+ 
diff -Nru modemmanager-1.4.12/debian/patches/series modemmanager-1.4.12/debian/patches/series
--- modemmanager-1.4.12/debian/patches/series	2015-11-04 19:47:50.000000000 +0800
+++ modemmanager-1.4.12/debian/patches/series	2017-11-29 16:11:49.000000000 +0800
@@ -5,3 +5,4 @@
 sierra-custom-init.patch
 new-sierra-legacy-plugin.patch
 dell-mbim-plugin.patch
+gobi-set-dell-modules-as-forbidden-devices.patch