The device is 18% thinner than the i Phone 4S, measuring 7.6 millimetres (0.3 in), and is 20% lighter at 112 grams (4 oz).
On July 6, 2013, it was reported that Apple was in talks with Korean mobile carrier SK Telecom to release the next generation i Phone with LTE Advanced technology.
As of January 2017, Apple's App Store contained more than 2.2 million applications available for the i Phone.
The i Phone 4 has an aluminosilicate glass front and back with a stainless steel edge that serves as the antennas.
It was at first available in black; the white version was announced, but not released until April 2011, 10 months later.
The i Phone 8 and 8 Plus were released in 2017, adding a glass back and an improved screen and camera.
The i Phone X was released alongside the 8 and 8 Plus, with its highlights being a near bezel-less design, an improved camera and a new facial recognition system, named Face ID, but having no home button, and therefore, no Touch ID.