iPhone 4
The iPhone 4
is a touchscreen slate smartphone developed by Apple Inc. It is the
fourth generation iPhone, and successor to the iPhone 3GS. It is
particularly marketed for video calling (marketed by Apple as FaceTime),
consumption of media such as books and periodicals, movies, music, and
games, and for general web and e-mail access. It was announced on June
7, 2010, at the WWDC 2010 held at the Moscone Center, San Francisco,
and was released on June 24, 2010, in the United States, the United
Kingdom, France, Germany and Japan.
The
iPhone 4 runs Apple's iOS operating system, the same operating system
as used on previous iPhones, the iPad, and the iPod Touch. It is
primarily controlled by a user's fingertips on the multi-touch display,
which is sensitive to fingertip contact.
The
most noticeable difference between the iPhone 4 and its predecessors
is the new design, which incorporates an uninsulated stainless steel
frame that acts as the device's antenna. 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-inch (89 mm) LED backlit liquid crystal display with a
960×640 pixel resolution is marketed as the "Retina Display".
The latest operating system release is iOS 5.0.1.
In
October 2011, the iPhone 4S was announced, which retains the same form
factor but includes many upgrades such as the A5 processor, iOS 5, and
an improved camera.
