IPhone 4 is now boxier, now with the back flat, rather than rounded. It keeps the 3.5-Inch Screen size, but quadruple the pixel 640x960, making it the highest resolution screen on a smartphone to date. Calls Apple really the new screen display retina, because it shows 326 pixels per inch, while the human eye to distinguish only about 300 ppi. In addition, the screen is the LCD IPS technology use (as in the iPad). The other new stuff includes a front-facing video call camera, 5MP main camera lens with LED flash and 720p HD video recording, micro-SIM slot, instead of the usual SIM, a secondary microphone for noise cancellation and many other new features.