iPhone 3GS is the 3^rd generation of the iPhones which was marketed and designed by the Apple company. It was launched on June 8^th’ 2009. Its major features are faster performance, higher resolution camera and video capability and video control. Iphone 3GS was released in USA, Canada and 6 European countries in June 2009 and was launched internationally in July and August 2009. iPhone 3GS also runs on iOS which is a specially designed operating system for the iPhones. The predecessor of iPhone 3GS is iPhone 3G and successor is iPhone4.