iPhone 3G
Here you can find all the information you need about the iPhone 3G. 
The iPhone 3G is the second generation of iPhone. It was the successor to the original iPhone. The third-generation iPhone was introduced on June 9 2008. The 3G was very similar to the iPhone 2G, containing the same 2 MP camera and no support for video recording. The performence of hte iPhone 3G was limited by the same 128 MB eDRAM memory unit. Nevertheless, the 3G featured several improvements over the original. It supported Assisted GPS, 3G data and Quad-band UMTS/HSDPA.