Hi, I got a 3G IPhone locked (I think). I am currently on AT&T without a contract (month to month) and have 64K smartchip cingular sim card. Can this card be used with IPhone, and what are good resources look at to get this Iphone jailbroken. I want to stay on AT&T but don't want a data plan. I use only 10-15 min or talk time and constantly have roll-over minutes that expire. Anyway, is this possible, and where can I get the program do do that. I have windows vista os.