diff --git a/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter b/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter
index 8429cd635..f5db32ac9 100755
--- a/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter
+++ b/luci-app-openmptcprouter/root/etc/init.d/openmptcprouter
@@ -181,6 +181,10 @@ start_service() {
 		EOF
 		/etc/init.d/rpcd restart 2>&1 >/dev/null
 	fi
+	if [ "$(pgrep ModemManager)" = "" ] && [ -f /etc/init.d/modemmanager ] && [ -n "$(uci -q show network | grep modemmanager)" ]; then
+		_log "Can't find ModemManager, start it..."
+		/etc/init.d/modemmanager restart
+	fi
 }
 
 stop_service() {
diff --git a/mptcp/files/usr/share/omr/post-tracking.d/post-tracking b/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
index 82475e4b5..ec4512260 100755
--- a/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
+++ b/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
@@ -1313,6 +1313,12 @@ if [ "$(pgrep rpcd)" = "" ] && [ -f /etc/init.d/rpcd ]; then
 	sleep 5
 fi
 
+if [ "$(pgrep ModemManager)" = "" ] && [ -f /etc/init.d/modemmanager ] && [ -n "$(uci -q show network | grep modemmanager)" ]; then
+	_log "Can't find ModemManager, restart it..."
+	/etc/init.d/modemmanager restart
+	sleep 5
+fi
+
 if [ "$(uci -q get v2ray.main.enabled)" = "1" ] && [ -f /etc/init.d/v2ray ] && [ "$(pgrep -f omr-tracker-v2ray)" = "" ] && [ "$(pgrep -f '/etc/init.d/omr-tracker')" = "" ]; then
 	_log "Can't find omr-tracker-v2ray, restart omr-tracker..."
 	/etc/init.d/omr-tracker restart