I'm completely unable to sync to my Mac after porting to T-Mobile! It seems as if iTunes goes online momentarily when you connect your iPhone to your computer, because I am now getting a message "There is a problem with your iPhone." I disabled my mac's internet connection and re-connected the iPhone, and the iPhone information won't even show up! The iPhone (1.1.3) works completely fine independent-of-iTunes (7.6). Is this some new system to verify all iPhones are on AT&T only? Is there some way to get around this? The iPhone works fine on T-Mo, but I can't sync with my mac!