Yea... I think I might buy an Iphone 1G from a friend for 100 bucks. I don't think he's unlocked it at all (I don't know if the 1G unlock is even possible), but if it is... If he originally had an ATT sim card in there... and I could unlock it and put in a Tmobile sim card.. would that still work? I know the data would be screwy... but I could send/receive SMS and talk??