iPhone 4 - Computer Definition
The fourth model of Apple's smartphone, which debuted in June 2010. The primary changes are multitasking, much higher resolution (see Retina Display), larger battery, home screen folders, voice control, five-megapixel camera, thinner case and video calling. A front-facing Webcam and Apple's FaceTime app enable iPhone 4 users, 4th-generation iPod touch users and Mac users to video call each other over Wi-Fi (as of iOS 6, FaceTime over cellular was added). In addition, a single tap switches the phone from front to back camera to turn the unit into a remote video camera for the person at the other end of the call. See iPhone 4S, iPhone and Antennagate.