iPhone development began in 2004. iPhone development began when Apple started to work on a highly secret "Project Purple" with a group of 1000 employees. Jonathan Ive also includes in this group. Jonathan Ive is the designer behind the iMac and iPod.  Apple CEO Steve jobs divert the attention away from a tablet and towards a phone.

The "Design by committee" is rejected by Apple point that had produced the Motorola ROKR E1, a largely unsuccessful l cooperation with Motorola. Cingular gave Apple the power to develop iPhone's hardware and software in-house. And paid a part of its monthly service income, interchange of four years for exclusive US sales,until 2011. In San Francisco, Jobs showed the iPhone to the public at the at the Macworld 2007 Convention on 9 January 2007.
The two models went on sale in the US on June 29, 2007.The two are;
1- US$499 4GB Model
2- US$599 8GB Model

When both models went on sale, hundreds of peoples are present outside the store.Many parts of media dubbing it "Jesus phone" because of intense reaction t o the launch of iPhone.
iPhone first generation was available in Germany, France, and UK in November and made available in Ireland and Austria in 2008.  Apple released the iPhone 3G in twenty-two countries including US,UK  on July 11, 2008. iPhone 3G by Apple, released in UK, US,France, Ireland, Germany, and Austria eighty countries and territories. Apple declared iPhone 3GS on 8 June 2009. Apple plans it to release later in June, July, and August. Many users would be objected to the iPhone's price.
The first generation of iPhone was made of aluminum with a black plastic. The iPhone 3G was ready to be used in the 8GB black design or a 16 GB black and white model.
The iPhone 4 front is of aluminosilicate glass and stainless steel back edge which act as antennas.The iPhone 4 was initially available in black only but after 10 months white version was also available.
iPhone received good reviews, however, critics from David Pogue and Walt Mossberg. iPhone attracts the attention of all age users and besides this use iPhone has also been used for business purposes.
iPhone spent $645 on the advertisement of iPhone in US from 2007 to 2011.
Apple sent invitations for the press event to be held in Cupertino on October 4, 2011, at 10:00 am. In this event details of iPhone, next generation was given.
After iPhone 4S model manufactured. One million iPhone 4S model were sold after 24 hours of its release. Due to its high price and great demand Apple become largest mobile handset vendor in the world.