with itunes 10.5, it has ios 5.0.1, but in the activation screen, i need to insert a sim card to activate it. i only have my tmobile sim card though (i cut it to fit the size of the tray). it needs an at&t sim card to activate it right? but i read that iphones are tied to the sim cards that they are with, so if i borrow my friend's att sim card, will it mess up his sim card? i really need help with this problem; i just want to be able to use my tmobile sim card in this iphone. i'll even downgrade my ios if necessary can anyone help?
i know that to be able to use tmobile, i'd have to unlock my iphone, but i don't think i can unlock it without jailbreaking first.. and i don't think they have unlocking for 5.0.1 yet. i've read about gevey sim but i don't want to spend money if i don't have to. and even if i got gevey sim, would the activation menu recognize that? my tmobile sim card doesn't have a data plan either.