Every time when i use my mobile, i always come across GSM and WCDMA options. Since i have been using mobile for quite a long time, i know what to do in the mobile settings even without knowing what i am dealing with. I have been hearing about 2G and 3G from '2G spectrum scam in India' news which went viral around the world. India have been criticised about the corruption going on from 2G spectrum scam to CWGs to Black money in Swiss bank reported by wikileaks etc. from 2010 onwards. All these speculations about 2G, 3G had taken my attention towards it for quite a long time. But i never understood what it was. I have bought Gionee M2 mobile 3-4 weeks before. It has unbelievable battery backup. My cousin played with my mobile for approx 12hrs with wifi on, and it had approx. 40% charge left to drain. Before buying this i was using LG P500.It was a good mobile, until you switch on your wifi, gps, data connection or played a game, the system works just fine. But whenever i enabl