How many years has the iPhone been on the market?

The first iphone was released in 2007 and was still a 2G version. Since then, it was Apples practice that every year they are unveiling newer version. 2008 was the release of the iphone G, and for this year 2009 , tey will be releasing the iphone 3G S version. Soiphone has been in the market for 3 years . If you want to know more about iphones, you can visit the link iphone.blogspot.com">http://nice-to-know-about-iphone.blogspot.com just look for the Topics "Do you want to buy an iphone" and "iphone 3G s added features and technical specifications"