iPhone is just a line of smartphones designed and sold by Apple Inc. Executes the iOS portable operating-system, formerly known as ‘iPhone OS’ until mid-2010.
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The iPhone has a camera of 8-megapixel images and a music player (equal to the iPod) plus software to send and receive text messages and voice messages. In addition it provides Internet services such as for example reading email, view web-pages and Wi-Fi connection. The first generation of phones were GSM Quad-band EDGE technology, the next generation already involved HSDPA.2 UMTS, the sixth generation and LTE included.
Apple Inc. Reported the iPhone on 2007.3 after a few rumors and speculations that published for many months.4 The iPhone was presented in america on June 29, 2007. It was named ‘Invention of the Year’ by Time magazine in 2009.5 On July 11, 2008 the iPhone 3G was produced and will come in 22 countries 6 and the end of year 70. This model supported by data transmission at a speed 3G technology and fastest AGPS.2
For WWDC 2009 event launched the iPhone 3GS (S for Speed, pace), presenting the same design because the 3G, but with improved hardware. The iPhone 3GS is up to two times faster than its predecessor loading web pages or running applications, takes advantage of the OpenGL ES 2.0 standard to provide better 3D artwork, supports HSDPA 7.2 MB (also called 3.5G), has a new 3-megapixel camera with auto-focus and video recording, voice get a handle on, compass and integral support for Nike + iPod. citation needed
While on June 7, 2010 in WWDC’10 Apple introduced the iPhone 4, with a new design both visually circular abandoning beauty and in terms Hardware. Contains the System of Apple A4 Chip, produced by Intrinsity and Samsung, which can be the same that contains the iPad (except the iPad 2 that contains a chip Apple A5, the Samsung Exynos 4210 like the Samsung Galaxy S2), although paid off frequency, 512 MiB of RAM, an LCD screen High res calling it self IPS Retina Display, two cameras, a 5 megapixel with solution for 720p HD recording and one other VGA.