Global System for Mobile Communications (GSM)
Code Division Multiple Access (CDMA)
3G networks is sufficient transmission capacity for video, graphics, and other rich media, like voice. Also, 3G is suitable for wireless broadband Internet access.
4G has the major distinction of 4G over 3G communications is increased data transmission rates as it can reach 20 – 40 Mbps (almost 10-20 times of ADSL). This allows you to either watch TV or download applications at the same time on your mobile.