Here is a brief comparison of the different internet types available.This also gives a clear information about the 3G technology.
GPRS and EDGE come under 2G category and the tariff for the 2G data plans are extremely low. Look at the Post which discusses the available plans of 2G category.
HELPLINE NUMBERS
You find the contact details for the different services of BSNL here. Click on the image and hit Browser’s back button for returning to the page.There are several helpline SMS services by BSNL toll free from Own network and Normal charges from other networks.You will find them all here and all are tested by me and functional.
SMS HELPLINES
ramanindia25@gmail.com