It seems that AT&T is now successful to secure the iPhone exclusivity deal for a longer period. AT&T’s service has always been an issue with most of the iPhone users but Apple seems to be quite content with the service. That’s why, when Tim Cook (and Peter Oppenheimer) were asked that whether Apple will continue with AT&T or not, he seemed quite positive about the deal with AT&T.
http://www.modmyi.com/forums/iphone-...ot-likely.html
