Apple iPhone 4S was launched in October 2011. It is running on the Apple A5 chipset processor with PowerVR SGX543MP2 GPU. The phone has 512 MB RAM and 16/32/64 GB storage of internal storage which is not expandable.
The iPhone 4S has a 3.5 inches, 640 x 960 pixels IPS display with a pixel density of 330 ppi. Coming to cameras, it has a 8 MP rear camera and a VGA front camera for selfies. It has a lightning port for data syncing and charging. There is a accelerometer sensor present on the iPhone 4S. It is a single SIM smartphone with support for 3G, Wi-Fi, Bluetooth and GPS too.
The iPhone 4S runs on iOS 5 and all this is powered by a 1432 mAh battery. It measures 115.2 x 58.6 x 9.3 mm (height x width x thickness) with a total weight of 140 grams including battery.