I have an iphoneiPhone 4 and my bfsignificant other has an iphoneiPhone 3G. HeThey just bought an iphone 4siPhone 4S and is willing to trade it for my iphoneiPhone 4. My phone is already registered under my name and all, while the new iphone 4siPhone 4S isn't registered under anyoneanyone's name yet. What is the best way to go about transferring all our data correctly? Do we need to go to Rogersour cell carrier or to Apple?