is the second generation of iPhone. It was the successor to the original iPhone, and is succeeded by the iPhone 3GS. Introduced on June 9, 2008 at the WWDC 2008 at the Moscone Center, San Francisco. The 3G was very similar to its predecessor, it contained the same 2 MP camera and did not support video recording, and its performance was limited by the same 128 MB eDRAM memory unit.[10] Nevertheless, the 3G featured several improvements over the original. It supported Assisted GPS and Quad-band UMTS/HSDPA.
A rear view of the original iPhone (left) made of aluminum and plastic, and the iPhone 3G, made entirely from a hard plastic material
Release date July 11, 2008 (2008-07-11)
Power Built-in rechargeable li-ion battery[4]
3.7 V 1150 mAh
CPU Samsung 32-bit RISC ARM 1176JZ(F)-S v1.0[5]
620 MHz
Underclocked to 412 MHz[6] Storage capacity 8 GB or 16 GB flash memory
Memory 128 MB eDRAM[7]
Display 3.5-inch screen (diagonally)
320-by-480-pixel resolution at 163 ppi
2:3 aspect ratio
18-bit (262,144-color) LCD
Graphics PowerVR MBX Lite 3D GPU[8] Input Multi-touch touchscreen display
Proximity sensor
Ambient light sensor
Microphone
Headset controls
Camera 2.0 MP with geotagging
Connectivity Quad-band GSM/GPRS/EDGE
(850 900 1800 1900 MHz)
Quad-band UMTS/HSDPA(800 850 1900 2100 MHz)
Wi-Fi (802.11b/g)
Bluetooth 2.0
USB 2.0/Dock connector[9]
Online services App Store, iTunes Store, MobileMe
Dimensions 115.5 mm (4.55 in) (h)
62.1 mm (2.44 in) (w)
12.3 mm (0.48 in) (d)
Weight 133 g (4.7 oz)
Reference:Apple offical website 2010,Apple offical website ,ACT,viewed 1 August 2010,
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