HI< recently I bought an iPhone 4, I just want to use the iPhone 3G to use as a phone, data connect is needed. I popped in the old SIM card, from my broken Nokia phone, the 3G works perfectly as on my second number, four days later, I got a txt as well as an email from AT&T, they infored me that because to use the iPhone, I must have a data plan so they started the plan for me. I called AT&T, the lady told me that I can't use the iPhone without a data plan but she was nnice engouh to take the plan for me. She also told me that AT&T knows what phone I use. my question is, is rthere a way I can hack the sim card to mask out the iphone data or fake the iPHone as a Nokia phone? it's such a shame that i can' even use my perfectly good 3G 