Hey everyone! I bought my Iphone 4 this week without a contract from the Apple store. I'm an international student in the USA and I dont have a social security number so I can't get a normal chip from AT&T unless i pay a 500 dollar deposit.....yep... So I was wondering if its possible to buy a prepaid microsim from AT&T? Does it work and how much does it cost? Can i just go in the AT&T store and buy it or are their requirements? Can i order it? Help me out please !