The iPhone 3GS is the third generation of iPhone designed and marketed by Apple Inc.. Its features primarily consist of faster performance, a camera with higher resolution and video capability, voice control, and support for 7.2 Mbps HSDPA downloading. It was released in the U.S., Canada and six European countries on June 19, 2009, in Australia and Japan on June 26, and internationally in July and August 2009. The iPhone 3GS runs Apple’s iOS operating system, the same operating system as used on previous iPhones, the iPad, and the iPod touch. It is primarily controlled by a user’s fingertips on the multi-touch display, which is sensitive to fingertip contact. Without modification, the iPhone restricts users from running any software that is not explicitly approved by Apple and distributed via its App Store. Doing so could potentially cause issues with software functionality which may not be covered under warranty.
The iPhone 3GS is preceded by the iPhone 3G and succeeded by the iPhone 4