How is LTE carrier switching performed on the MX67C integrated LTE modem? I have two SIM cards, one AT&T and one Verizon. Both have been activated with the IMEI address of the MX67C's integrated LTE modem. the modem will only come up and connect on Verizon. When the AT&T SIM card is installed modem status simply says "Enabled" and shows no LTE connection.
Does the MX67C automatically switch LTE carriers based on inserted SIM card, or do I have to manually do some process when moving from AT&T to Verizon?