What exactly happen when I change from 2G to 3G in mobile settings I mean operation inside mobile not just increase in speed?
I have a post paid connection with BSNL. It has data preactivated. However, if I take the sim from my mobile and put it in a data card, it doesn't seem to be working. There seems to be some hitch in the settings, particularly the dial number. Can anyone tell what needs to be exactly done?