diff --git a/meta-digi-dey/recipes-connectivity/modemmanager/modemmanager/cellularifupdown b/meta-digi-dey/recipes-connectivity/modemmanager/modemmanager/cellularifupdown
index f38082719..15e993c8d 100644
--- a/meta-digi-dey/recipes-connectivity/modemmanager/modemmanager/cellularifupdown
+++ b/meta-digi-dey/recipes-connectivity/modemmanager/modemmanager/cellularifupdown
@@ -7,6 +7,13 @@ POLLING_WAIT=5
 [ -z "${IF_APN}" ] && exit 0
 
 background_connect() {
+	# The XBee Cellular needs more time to settle down before MM is able
+	# to detect it. As the XBee is connected to a 'ttymxc' serial port,
+	# we check those ports to conditionally delay the launch of MM.
+	if echo "${IF_PORT}" | grep -qs ttymxc; then
+		sleep 25
+	fi
+
         # Ensure ModemManager is running
         killall -0 ModemManager 2>/dev/null || ModemManager --log-file=/var/log/modemmanager.log &