Hi all. My wife upgraded her iphone to a 3gs. She has syncd and has her info, contacts etc on it. Now we want to swap phones. She gives me her new 3gs and I give her my year old 3g version. We're on family plan at ATT so I guess we can swap sim cards. Then how do we get our contacts, apps etc. on to the respective phones without having all of her info on mine and visa versa. Any step by step info greatly appreciated. thanks have a good day.