IPhone
The first iPhone, iPhone 2G was released on June 29, 2007. In the first month on sale (Jul 2007), it sold 2.315 million units. On July 11, 2008, the iPhone 3G was released which, hence the name, got upgraded with 3G wireless internet. On June 17, 2009, Apple released the iPhone 3GS which featured a compass and a 3.2-megapixel video camera.