A cousin of mine is visiting me in India and I was wondering if he can get an Iphone 4 upgrade if he gives his 3GS to me. The phone is att locked and I will have to jailbreak and unlock it to use it. More importantly can he get the iPhone 4 by paying 199 ? Does he have to show his old 3GS at the store? He checked with att and they said he can upgrade by paying 199 so thats taken care of. Any inputs would be grealy appreciated. Thanks.