iPhone combines three products — a revolutionary mobile phone, a widescreen iPod, and the internet in your pocket — into one handheld device. iPhone also introduces an entirely new user interface based on a revolutionary 3.5-inch multi-touch display that allows users to control iPhone with just a tap, flick or pinch of their fingers. The display is made of optical-quality glass for superior scratch resistance and clarity. Changes to volume, muting the ringer and putting an incoming call through to voicemail can be done using discreet buttons on the top and side of iPhone. iphone comes with a 8GB of flash memory.