A month ago, I purchased a Nokia Lumia 521. I activated it with a Walmart Family Mobile SIM card because my sister already had an account, and it was a good price. It worked beautifully in my hometown, but now it can't find a cellular network to connect to. I would use Wifi Calling, but that requires a my.tmobile account (which I can't create, because technically I'm not on a T-mobile plan).
I'm at the end of my rope. The coverage map says I'd get "very good" coverage from where I live now. I get nothing. Do I have any options here? (That doesn't require a lot of money, preferably.)