Its primary features opposing the precedent version of the iPhone and are related to camera improvements and performance,as well as adding video capability as well as voice control or a 7.2 Mbit/s HSDPA downloading support. However,due to not implementing the HSUPA protocol in their iPhone 3GS device,Apple had to remain at a limited 384 kbs upload speed.

U.S. and Canada residents,as well as people from other six European countries benefited from the release of the new iPhone 3GS on June 19,2009,as Japan and Australia received the device on June 26.The international release took place in July and August 2009. The iPhone 3GS benefits of Apple's iOS operating system,as well as all precedent iPhone models and other multi-touch screen based Apple devices like the iPod Touch or the iPad. As already mentioned,the iPhone 3GS is control by a finger-sensitive multi touch display which allows users to execute comands on the device using only their fingers.
The applications and software executed on the iPhone 3GS must be approved by Apple in order for proper use to be succeeded,as executing a non-Apple approved software program on the device may redirect to serious software programs that could not be covered by the device's warranty.The iPhone 3GS models with the new bathrooms started to appear in mid-September 2009 and had blocked the 24k exploit that was mainly used for jailbreak purpose.
As the "S"(which stands for Speed) in "iPhone 3GS" may suggest,the iPhone 3GS represents a hardware improved version of the iPhone 3G which focused on hardware speed. However,certain features were actually introduced in the iPhone world by the iPhone 3GS but lost their model exclusivity when the new iPhone 4 came out and presented improved versions of those features.

The iPhone 3GS features an LCD capacitive display with a pixel density of 163 ppi (pixels per inch) on a 3.5 inch screen designed by Apple Inc. but manufactured by LG.The 3GS display shows several improvements from the last iPhone model as it now supports 24-bit color emulation and has an oleophobic coat that helps users to prevent fingerprints on the screen.
The capacitive touchscreen was designed for the use of one finger,or more than one,as the iPhone 3GS is multi touch sensitive. This means that it can perform tasks by reading several fingers on the display at the same time. For example,two fingers can be used to zoom in and out when reading a documents,or on the internet. The iPhone represents a successful addition to the iPhone family,as it is preceded by the iPhone 3G and succeeded by the iPhone 4 (the iPhone 4 is the last available iPhone, launched in 2010).