A few weeks ago I was in the United States and I had to buy a new phone, because apparently over there phones supporting only 4g and not 5g can not connect to the network.
As such, I went to AT&T if I'm not mistaken. For 45$ they gave me a phone and one month of connection. The deal is pretty decent, but they also told me the phone can only work with at&t and thus it is now a brick in Europe.
I don't think I'd use it anyway because I need a double SIM phone, but it could be nice for testing stuff or to give it out to one of my homeless friends.
It is a Motorola, do you know if there is a simple way to unlock it or do I have to flash a custom ROM on it?

I'll have to check the model, I don't have it on me right now.