I have at&t and no data plan and i already own a samsung behold 2 unlocked t-mobile phone, i can get on the web and download apps everything with wifi at home or in town where free wifi is available. Will all T-mobile unlocked phone work like this with at&t i've been doing tons a reading and cant find the exact answer i've been reading tons of reviews for different phones and cant really find the answer anyone know? i need a phone really soon and im looking on ebay for one so if someone could answer soon theres a few phones im watching that only have a day let please let me know asap