![]() ![]() Retina display Main article: Retina display FaceTime allows a user to make a video call over Wi-Fi connection to another iPhone 4 or later, iPod touch (4th generation) or later, a Mac with a webcam running Mac OS X 10.6.7 or later, or an iPad 2 or later. The iPhone 4 adds a new feature to the iPhone line, FaceTime. The back has an upgraded 5 megapixel camera with an LED flash and can now record in HD 720p video. The front features a 0.3 megapixel selfie camera. The iPhone 4 is the first iPhone model to have dual cameras. Retina display gives 4x more pixels than previous generation, 326 ppi at 960圆40. ![]() a front 0.3 megapixel camera for FaceTime is included. IPhone 4 features a new 5 megapixel camera with four element lenses, improved white balance and tap to focus for video. ![]() The white version for GSM and CDMA became available on April 28. On January 11, 2011, Verizon announced that it would be selling a CDMA iPhone 4 on February 10, ending Apple's exclusivity agreement with AT&T. It first came in in 16 and 32 GB versions, in black and for GSM only. The iPhone 4 originally shipped with iOS 4 and could be upgraded up to iOS 7.1.2. ![]() Like previous models of iPhones, its key features included a native mailing app, a web browser, SMS messages, a phone function, and an iPod player, among other things. ![]()
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