My husband and I just got I Phone 5's with a new carrier and plan on selling our 3gs and 4 we had with AT&T. I want to make sure there is no personal information available on these phones when I sell them. I have gone into settings and clicked "erase all content and settings" and wiped the phone off. I know these phones have SIM cards in them and wonder if there is personal information on them that is not removed when I erased the phones? Do people sell their phones with the cards in them or what? Appreciate any help/advice anyone can give me. Thanks!