marketed by Apple. The first iPhone was unveiled by Apple CEO Steve Jobs on
January 9, 2007 and released on June 29, 2007. The 5th generation iPhone is
expected to be globally released in Q3 2011 inline with the release of iOS 5.0,
the Apple operating system for handheld devices.
An iPhone can function as a video camera , a camera phone, a portable media
player, and an Internet client with email and web browsing capabilities, can send
texts and receive visual voicemail, and has both Wi-Fi and 3G connectivity. The
user interface is built around the device's multi-touch screen, including a
virtual keyboard rather than a physical one. Third-party as well as Apple
application software is available from the App Store, which launched in mid-2008
and now has over 425,000 "apps" approved by Apple. These apps have diverse
functionalities, including games, reference, GPS navigation, social networking,
security and advertising for television shows, films, and celebrities.
There are four generations of iPhone models, each accompanied by one of the four
major releases of iOS . The original iPhone was a GSM phone that established
design precedents like screen size and button placement that have persisted
through all models. The iPhone 3G added 3G cellular network capabilities and A-GPS
location. The iPhone 3GS added a compass, faster processor, and higher resolution
camera, including video recording at 480p. The iPhone 4 has a rear facing camera
(720p video) and a front facing camera (at a lower resolution) for FaceTime video
calling and for use in other apps like Skype. The phone also featured a higher-
resolution display; it was released on June 24, 2010. In the U.S., AT&T was the
only authorized carrier until February 10, 2011, when a CDMA version of the iPhone
4 launched for Verizon.
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