History of Apple Inc.
The first version of the iPhone became publicly available on June 29, 2007 in selected countries/markets. It was another 12 months before the iPhone 3G became available on July 11, 2008. Apple announced the iPhone 3GS on June 8, 2009, along with plans to release it later in June, July, and August, starting with the U.S., Canada and major European countries on June 19. This 12-month iteration cycle has continued with the iPhone 4 model arriving in similar fashion in 2010, a Verizon model was released in February 2011, and a Sprint model in October 2011, shortly after Jobs' death.
History of iPhone
On October 16, 2007, the iPhone Dev Team released AnySIM 1.1, the free utility that unlocks iPhones. The updated version works on firmware version 1.1.1, but doesn't fix baseband problems caused by updating an unlocked 1.0.2 phone up to 1.1.1. On October 23, 2007, the iPhone Elite Dev-Team released Revirginizing Tool to rebuild the lock table in the seczone area to repair the damage done by the original anySIM 1.0x unlockers so unlocked 1.0.2 iPhones can upgrade to 1.1.1 without bricking iPhone. The tool is unbricking the previously bricked iPhones.