New iPhone 4 models are displayed after Apple CEO Steve Jobs unveiled it during the Apple Worldwide Developers Conference in San Francisco, California, June 7, 2010.The iPhone 4 is sleeker and more advanced than the original iPhone that came out in 2007. It comes in black or white, though it has a more angular look. Its front and back are covered with glass, and it is rimmed with stainless steel that acts as part of the phone's antenna. [Agencies]
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