The new Apple iPhone 4 is now more square, with a flat back INSTEAD OF round. Still It Keeps the 3.5-inch screen, But quadruples the number of pixels to 640x960, making it the smartphone with higher resolution in the market. Apple calls this new display Retina, Since it's capable of displaying 326 pixels per inch, while the human eye distinguisher about 300ppi. In Addition, the display uses IPS LCD technology, the same Used by the IPAD. Other features include front camera for video calling, 5 megapixel main camera with LED flash and video recording at 720p, micro-SIM slot, secondary microphone for sound cancellation and Other advanced features.