I have searched for this problem, but could not find the same problem. I have two 3GS phones and am using 1 computer with itunes 18.104.22.168. I was able to sync my black iphone normally, and then I disconnected it and plugged in the white iphone. The computer recognized it was a different phone and we named it differently. Now when I sync the white 3GS, all of the contacts from the black phone went onto the white iphone. The computer still is distinctly recognizing the white 3GS as it shows up on the left and top of itunes correctly and the correct phone number is displayed. I am also scared if I resync the black 3GS then the contacts will either be deleted on the black phone or changed to whatever the white phone's contacts were. We have two different apple accounts and I even logged out of the black phone's account and logged in with the white one, but after syncing with the white phone's account it is still the black phone's contacts. Please help. Thank you.