T Mobile Sim Card on a AT&T phone?

Yeah you can. I haven't seen the videos on how to do it but u basically hack into the phone and u can use ur TMOBILE sim card in it. You can also buy the phone already unlocked or the card to do it yourself on eBay. Some sellers do a good job of explaining how it works.

Unlocking a phone is wiping out the information on that particular phone. A locked phone prevents you from using another company's cellphone with another company. There are videos on youtube that can show you how to do it.

you will might desire to call AT&T and get an unencumber code. to try this you are able to be a shopper in good status and speak to should be six months previous (from date they started out promotion them no longer unavoidably once you got it).

i don't think it will work but maybe because all is different is the name

AT&T