Apple iPhone 4 was launched in June 2010. It is running on the Apple A4 processor with PowerVR SGX535 GPU. The phone has 512 MB RAM and 8/16/32 GB storage of internal storage which is not expandable.
The iPhone 4 has a 3.5 inches, 640 x 960 pixels IPS display with a pixel density of 330 ppi. Coming to cameras, it has a 5 MP rear camera. It has a lightning port for data syncing and charging. There is a accelerometer sensor present on the iPhone 4. It is a single SIM smartphone with support for 3G, Wi-Fi, Bluetooth and GPS too.
The iPhone 4 runs on iOS 4, upgradable to iOS 5 and all this is powered by a 1420mAh battery. It measures 115.2 x 58.6 x 9.3 mm
(height x width x thickness) with a total weight of 137 grams including battery.