Hey everyone, if I buy a 4S from ATT, how can I wipe my info & account information from it and sell it? If I activate it on my account, then do a restore and not sync it with my info, then remove the SIM, then I should be able to sell it to anyone that wants the phone without extending their contract, right? Is there anything else that I would need to (or should) do? Does that make it an unlocked GSM phone?