IPhone 2G

The iPhone 2G (also known as the iPhone 1, and the iPhone (first generation)) is the first smartphone designed and marketed by Apple Inc. After years of rumors and speculation, it was officially announced on January 9, 2007, and was released in the United States on June 29, 2007.

Development of the iPhone as a product began in 2005 and continued in complete secrecy until its public unveiling. The device broke with prevailing mobile phone designs by eliminating most physical hardware buttons, and eschewing a stylus for its screen-based interface, instead featuring only a few physical buttons and a touch screen. It featured quad-band GSM cellular connectivity with GPRS and EDGE support for data transfer, and made use of continuous internet access and onboard processing to support features unrelated to voice communication. Its successor, the iPhone 3G, was announced on June 9, 2008.

iDay
The iPhone was released in the United States on June 29, 2007 at the price of $499 for the 4 GB model and $599 for the 8 GB model, both requiring a 2-year contract. Thousands, if not, millions of people were reported to have waited outside Apple and AT&T retail stores just days before the device's launch; many stores reported stock shortages within an hour of availability. To avoid repeating the problems of the PlayStation 3 launch, which caused burglaries and even a shooting, off-duty police officers were hired to guard stores overnight.

Operating Systems
NOTE: Bold marks the device's original operating system that came either pre-installed on release, or required iTunes to install the OS, * means that the company dropped support with that update, and Italics means that the operating system is no longer supported.
 * iPhone OS 1 (required iTunes to download, released June 29th, 2007)
 * iPhone OS 2 (released July 11th, 2008)
 * iPhone OS 3* (released June 17th, 2009)