iphone 4

he iPhone 4 is the fourth generation of iPhone, and successor to the iPhone 3GS. Introduced on June 7, 2010 at the WWDC 2010 at the Moscone Center, San Francisco, it is the first device to support FaceTime, Apple’s video calling application. It has an Apple A4 processor, 512 MB of eDRAM, a 3.5 inches (89 mm) LED backlit liquid crystal display with 960-by-640 pixel resolution, and the iOS 4 operating system.