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 edd7a35f6..d5413e72c 100755
--- a/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
+++ b/mptcp/files/usr/share/omr/post-tracking.d/post-tracking
@@ -807,9 +807,24 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || [ "$interface_up" != "true" ]; then
 		sleep 20
 	fi
 
+	if [ "$interface_up" = "true" ] && [ -n "$OMR_TRACKER_INTERFACE" ] && [ -n "$OMR_TRACKER_DEVICE" ] && [ "$(uci -q get network.$OMR_TRACKER_INTERFACE.proto)" = "dhcp" ]; then
+		for modem in $(mmcli -L | awk -F/ '{ print $6}' | awk '{print $1}'); do
+			if [ -n "$(timeout 2 mmcli -m $modem -K | grep $OMR_TRACKER_DEVICE)" ]; then
+				modem_device=$(mmcli -m $modem -K | grep 'modem.generic.device ' | awk '{print $3}')
+				[ -n "$modem_device" ] && modem_interface=$(uci show network | grep $modem_device | awk -F. '{print $2}')
+				[ -n "$modem_interface" ] && {
+					_log "No anwser from $OMR_TRACKER_INTERFACE ($OMR_TRACKER_DEVICE), restart associed interface $modem_interface"
+					ifup $modem_interface
+				}
+			fi
+		done
+	fi
+
+	# This part must be done after modems restart because we have no idea when modems will be ready again... (another solution would be to check ModemManager status)
 	if [ "$OMR_TRACKER_PREV_STATUS" = "$OMR_TRACKER_STATUS" ]; then
 		exit 0
 	fi
+
 	if [ "$multipath_status" != "off" ] || ([ -n "$OMR_TRACKER_INTERFACE" ] && [ "$(uci -q get openmptcprouter.$OMR_TRACKER_INTERFACE.multipathvpn)" = "1" ]); then
 		if [ "$OMR_TRACKER_STATUS_MSG" = "" ]; then
 			_log "$OMR_TRACKER_INTERFACE ($OMR_TRACKER_DEVICE) switched off"
@@ -910,6 +925,8 @@ if [ "$OMR_TRACKER_STATUS" = "ERROR" ] || [ "$interface_up" != "true" ]; then
 			config_load network
 			config_foreach set_route interface $OMR_TRACKER_INTERFACE
 			config_foreach set_route6 interface $OMR_TRACKER_INTERFACE
+		else
+			_log "Default gateway disabled, no default gateway set"
 		fi
 		if [ "$(uci -q get openmptcprouter.settings.shadowsocksudp)" = "1" ] && [ "$(uci -q get shadowsocks-libev.sss0.disabled)" != "1" ] && [ "$(uci -q get openmptcprouter.omr.shadowsocks)" = "up" ] && [ "$(uci -q get shadowsocks-libev.ss_rules.redir_udp)" = "" ] && [ "$(uci -q get shadowsocks-libev.hi1.mode)" = "tcp_and_udp" ] && [ "$(uci -q get shadowsocks-libev.sss0.obfs)" != "1" ]; then
 			_log "Tunnel down use ShadowSocks for UDP"