Formerly T-Mobile LG Stylo 4 not working at my Home
I purchased an unlocked LG Stylo 4 (LM-Q710TS) from an individual. I took it to an AT&T store where they verified that it was unlocked, set me up with AT&T service, verified that I have AT&T service where I live and made sure it was working for voice, text & data. When I got home, 70 miles away, I had no service for anything.
A week later I took it to another store where they told me that they think it has something to do with it originally being a T-mobile phone -- I do NOT have T-Mobile service where I live.
Another week later, I took it to a T-Mobile store and they could not understand why it wouldn't work at my home since it worked "in the city".
So far, I've paid for a phone that I haven't been able to use and already 1/2 month of AT&T service -- which I cannot use at my home or other more local towns to where I live (99+% of the time).
Any help would be appreciated.