It is the third Generation of wireless mobile communication technology and it is an upgrade of 2.75 G (EDGE technology) for faster data transmission. 3G can provide a vast range of applications like mobile internet access, wireless voice calls, video calls , mobile Tv etc. 3G is based on WCDMA ( Wideband Code division multiple access ) concept which can provide enough data rates for Audio and video streaming services on mobile devices. The technical name of 3G technology is UMTS ( Universal Mobile Telecommunications system ) which can provide higher spectral efficiency than GSM technology. It has two modes of operation FDD (Frequency Division duplex) and TDD ( Time division duplex). 3G provides a peak speed of up to 14 mbps and works at frequencies up to 2.1 GHz.