iPhone 4
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The iPhone 4 (pronounced /aɪ.foʊn.fɔr/ EYE-fohn-fohr) is the fourth model of iPhone, and successor to the iPhone 3GS. Announced on June 7, 2010 at the WWDC 2010 at the Moscone Center, San Francisco, it was released on June 24 in the UK, France, Germany, Japan and in the US. The iPhone 4 has all the features associated with an iPhone; only major changes from the iPhone 3GS are listed below. The most noticeable difference is a new design. The primary new design feature is a stainless steel frame, which additionally acts as both antennae. The internal components of the device are situated between two panels of chemically strengthened aluminosilicate glass. It has an Apple A4 processor and 512 MB of eDRAM, twice that of its predecessor and four times that of the original iPhone. Its 3.5 inches (89 mm) LED backlit liquid crystal display with an
increased 960-by-640 pixel resolution is marketed as the "Retina Display." It comes preinstalled with the iOS 4 operating system, and is currently the only device to support a new video calling feature, FaceTime. Prior to the official unveiling of the iPhone 4 on June 7, 2010, two prototypes were brought to mainstream media, breaching Apple's normally secretive development process. Many of the speculations regarding technical specifications proved accurate. On April 19, 2010, gadget website Gizmodo reported that they had purchased an iPhone prototype for $5000, and furthermore, had conducted a product teardown of the device. The prototype is reported to have been lost by an Apple software engineer in Cupertino, California. Gizmodo noted that, compared to the iPhone 3GS, the prototype included an additional front-facing camera, a larger rear-facing camera lens and a LED flash, a micro-SIM, a higher resolution display, and a secondary microphone for noise cancellation. The unit had a flat rear panel that was constructed of a clear material which was speculated to be either glass or plastic, and featured a decorative aluminium strip that completely surrounded the edge of the phone. It had separate buttons for increasing and decreasing volume, instead of a single long button. Gizmodo also noted that the device's screen appeared to be slightly smaller than
History
Prototypes