Before signing any agreement with T-Mobile, make sure you are aware that should you decide to change carriers, they will lock you phone. Doesn't matter if your phone is paid for. Doesn't matter if your account is current. Should you decide to change carriers, understand that it may take several days before they decide you can use your phone again. Evidently, if you've ever used their service, they think they own your phone. Should you call their customer service, they'll put you on the phone with an arrogant condescending jerk. My advice is to think twice. Then really think again. There are plenty of other options available.