I found a good deal from a friend on a 3G Iphone and was wondering if it was possible to use the SIM from my AT&t Razr and unlock/jailbreak it to work with that, because I cant afford the data plan. Is there any way of doing this? Basically just staying on AT&T and using my sim card, but having no data plan? Im just confused because everyone says the 3G hasnt been unlocked- I dont know if it has to be in order to do this. Thanks.