Deployed overseas (Europe) - Activating a new prepaid sim card
I am currently deployed overseas. My previous ATT Bill Pay plan had expired while I was over here ( I intentionally ended it due to long term overseas deployment ).
I will now be returning home soon. I purchased a pre-paid sim card online and had it sent to me here. I received a new number and the sim card arrived this morning.
The device is a fully unlocked iPhone XS purchased in the US from an Apple Store.
However, when I insert the sim card it just says "No Service". I assume this is because I am not connecting to AT&T cell towers.
Is there anything I can do from here or do I need to wait until I return home ? I won't be doing so for another couple months and I want to start providing my new number to various service providers and family / friends.