The debut of the Apple iPhone 3G was announced on June 9, 2008 during the keynote address by Steve Jobs at the WWDC 2008 convention.
Shortly thereafter the Internet was buzzing with information about AT&T's pricing plan for the new phone. Other details also emerged, including an upgrade option for some existing iPhone customers.
iPhone Trade-In
Upgrades
Users who purchased an iPhone prior to May 27th will still have to pay the regular price for a new iPhone 3G handset. However, the new two year contract will override the previous contract for services.