Though Apple co-founder Steve Jobs unveiled the iPhone at the MacWorld Expo on January 9, 2007, it would not be until Friday, June 29, 2007, that it officially went on sale. You had one choice in cellular carriers, AT&T, and though it did not support the then-new 3G network or have any apps, it was described as “revolutionary” and “game-changing” by the press.

Source:: Apple Insider