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The iPhone 4 is a smartphone that was designed and marketed by Apple Inc. It is the fourth generation iPhone, succeeding the 3GS and preceding the 4S.Following a number of notable leaks, the iPhone 4 was first unveiled on June 7, 2010, at Apple's Worldwide Developers Conference in San Francisco, and was released on June 24, 2010, in the United States, United Kingdom, France, Germany, and Japan. Jan 22, 2010 · The iPhone 4S also has a front facing VGA camera. This can be used for self-portrait photos and video, as well as video calls. These can be carried out over Wi-Fi networks with other iPhone 4S and iPhone 4 users thanks to the FaceTime application. The camera on the iPhone 4S greatly benefits from the dual-core 1 GHz Apple A5 processor.