Hey guys, I've read a lot before choosing to buy the new 3G S from AT&T and unlocking but one question still remains... If I'm going to cancel after 31 days to unlock and use it outside the US. do I need to activate it when I buy? Or can I just buy it, never activate it and cancel the plan after 1 month? Because my mom's buying it for me in the US and she doesn't have a clue on how to activate it and I've heard people saying you can't even use the features of the phone if you don't activate it. And If I do have to activate it, can I do it with the AT&T SIM card being outside of the US? Thanks a bunch you guys!