The most noticeable difference between the iPhone 4 and its predecessors is the new design, incorporating a stainless steel frame, non insulated act as antennas. The special thing, this is the next-generation iPhone the first is equipped with ultra-definition touch screen is Apple called 'Retina display' with a resolution of 960 x 640 pixels (pixel density at 326 ppi). iPhone 4 is also the first version with front camera and flash back. iPhone 4 is equipped with A4 processor speed 1 GHz, 512 MB RAM. The camera which was also upgraded to 5 MP and can shoot 720p video quality. In computer memory have two options under the 16 GB and 32 GB.
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