What is Apple iPhone?

Apple iPhone is a series of smartphones based on the company’s proprietary operating system iOS. The first iPhone, announced in 2007, featured a touch screen input-based user interface, camera, and multimedia playback capabilities. The phone was later upgraded to support internet connectivity, which has since become one of the core capabilities of the iPhone.

 

The first-generation iPhone was followed by a 3G-ready iPhone 3G, and then by a 3GS variant with improved hardware and application support. The iPhone 4 got the thin metallic chassis, high-resolution screen and a front-facing camera for video calls. Its upgrade, the iPhone 4S, got improved hardware