The most recent generation iPhone have data rates and offers access innate features. For example: open a web page, email attachment and use 3D graphics for gaming. Including voice control, music settings, and other features .There is also the ability cut, copy and paste files word, which combines a keyboard with landscape model. Compared with the old version, capability the iPhone 3GS experience changes significant. 

IPhone 3GS uses technology HSDPA 7.2 Mbps plus faster processor with the ability of ARM Cortex A-8 600 MHz and equipped with power SGX graphics.  Camera sector have in upgrade to 3.15 MP. There are also GPS supported facilities with digital compass.

IPhone 3GS Reviews:

iPhone 3 g s

HSDPA, 11,55×6,21×1,23 cm, 135 g, screen 3.5 inch, TFT resistive touch screen 16 million color, 320×480 pixels, OS: iPhone OS {based on Mac }camera 3,2 MP, autofocus, touch focus,  geo-tagging, memory 16GB/32GB storage, 256 MB Ram, Wi-Fi 802.11b/g, Bluetooth,  data cable , 3.5 mm headset jack, GPS support, digital compass, Google Maps, audio/video player, TV out, Voice  command ,multi-touch input method and  battery Lithium ion .