After many months of rumors and speculation, the first iPhone was officially announced on January 9th, 2007. Also known as the “iPhone EDGE” or “iPhone 2G”, it was launched in the United States on June 29th, 2007, before being marketed in a few other European countries as well before the end of 07.
Featuring quad-band GSM, the EDGE compatible iPhone was the first phone with an entirely software based interface, and no hardware keyboard. It was an amazing concept, named by Time magazine, the 2007 invention of the year.
The iPhone 3G is launched July 11, 2008 in the world, he admits the standard 3G via UMTS with HSDPA 3.6 Mb/s and has a GPS device. It has a plastic casing and some pretty weak specs by today’s standard.
The iPhone 3GS was introduced June 19, 2009. Identical in appearance to the 3G but sporting an integrated video camera, increased megapixels and auto-focus for its photo function, better overall performance and introduces voice commands and a compass. It supports downloading of 3G data at 7.2 Mb/s HSDPA It in the US, Canada UK, Germany, France, Austria and Ireland.
The iPhone 4 was announced at the June 7, 2010 conference by Steve Job. The release of iOS 4 coincided with the release of the new iPhone. In comparison with the 3GS, the 4 has a superior screen definition (960 ×640 px vs 480 ×320 px) and the new Retina display, integrated flash, and a front-facing camera for video conferencing.
The iPhone 4S is identical in appearance to the iPhone 4, was announced at Apple headquarters on October 4, 2011 by Tim Cook the new CEO of the firm. With a new A5 dual-core processor chip, it incorporated some major improvements over previous versions including an 8 MP camera, SIRI the personal assistant , voice recognition, and the new IOS5 operating system 5.
The iPhone 5, with the new IOS 6 with the new A6 chipset., was introduced on September 12, 2012. It features a longer screen but the same width as the previous iterations. The improved definition 1136px x 640px with an aspect ratio of 16:9. It weighs only 112 g and uses the Apple Lightning connector instead of the 30-pin connector. The back of the iPhone 5 is made of anodized .