Return period is 30 days For AT&T and if you just bought a iPhone, return it, because they will make you pay full price for a iPhone 4, that price is over $600. My date of upgrade is not until January 31st 2011. It will only allow me to upgrade by paying full price. But i am just going to hand my mom my 3GS and add a new line and iphone for her and swap sim cards. She will get my 3GS and I will buy the IPhone 4. She will not pay for a phone and her monthy bill through us will only be about $45. We have the 1400 min family plan and have over 8000 rollover minutes. Their family plans are retarded, the one we are on is too big, the one below is too small.