How much would a iPhone 4 cost of I'm due for a upgrade?
I have AT&T
According to the Apple website, the iPhone 4 starts at $199 if you have a renewed AT&T contract. There is no central database of iPhone 4 availability that is in the public hands, only Apple holds this data. For details, visit http://osxdaily.com/2010/06/07/check-att-iphone-upgrade-eligibility/.