Apple iPhone 3GS was launched in June 2009. The phone has 256 MB RAM and 8/16/32 GB storage of internal storage which is not expandable.
The iPhone 3GS has a 3.5 inches, 320 x 480 pixels TFT LCD display with a pixel density of 165 ppi. Coming to cameras, it has a 3.15 MP rear camera. It has a lightning port for data syncing and charging. There is a accelerometer sensor present on the iPhone 3GS. It is a single SIM smartphone with support for 3G, Wi-Fi, Bluetooth and GPS too.
The iPhone 3GS runs on iPhone OS 3, upgradable to iOS 5. It measures 115.5 x 62.1 x 12.3 mm (height x width x thickness) with a total weight of 135 grams including battery.