Confirming months of rumor and speculation, Apple CEO Steve Jobs marched on stage at the company’s Worldwide Developers Conference in San Francisco Monday to unveil a new model of the iPhone. The new iPhone will run on third-generation, or 3G, networks, which offer higher data transfer speeds than the EDGE network that the original iPhone runs on. In addition, the new iPhone will sell at the bargain price of $199 when it goes on sale on July 11. When it first debuted less than a year ago, the original iPhone sold for as much as $599.