The iPhones are touch
screen smart phones which are developed by Apple Inc in the.
IPhone 4 is known as the fourth generation iPhone and successor to
the older version of apple’s smartphone that is iPhone 3GS.
It is particularly
marketed for video calling, consumption of media such as books and
periodicals, movies, music, and games, and for general web and email access. It
was announced on June 7, 2010, at the Apple Worldwide Developers
Conference 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 prior iPhones, the iPad, and
the iPod Touch. It is mainly controlled by a user's fingertips on
the multi-touch display, which is sensitive to fingertip contact. It
originally shipped with iOS 4. The latest version available is iOS 7 (September
18, 2013). 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 DRAM, 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".
In October
2011, the iPhone 4S was announced, which retains the same form factor
but includes upgrades such as the A5 processor, Siri, and an improved
camera. iPhone 4 also ships with Apple's latest software, iOS 4. It brings
features such as multitasking and folders, unified inbox and threaded email,
and FaceTime video calling. Each of these come with limitations however, that
while making them nearly effortless for new users to pick up, ensure power
users will retain a level of frustration with the platform.
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