Just finished a 10-day trip to Germany. Powered down phone in USA, arrived in Germany, popped in local SIM card, powered up phone - could not find service. Switched to GSM, rebooted phone, had no further problems at all (did not use data - voice only). On return to USA, powered down phone in Germany, put Verizon SIM back in and powered up phone in US on landing. Had to switch back to LTE from GSM and everything worked fine. Got all my email, texts, app updates, etc. No issues at all and they certainly did not deactivate my Verizon SIM.
Thanks to all the previous posters for the info.
Thanks to all the previous posters for the info.