Heres another video preview of the newly announced iPhone 4. The iPhone 4 is drastically different than the iPhone 3G or 3GS. To start, it has an all new design features a sheet of glass on the front as well as the rear. Having glass on the rear means that it is scratch resistant. The edges are aluminum and act as the antenna for the WiFi, Bluetooth, and cellular radios. The iPhone 4 is the thinnest smartphone available at 9.3mm, but is a bit heavier than the iPhone 3GS.
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