Airtel recently announced that it will be giving monthly 2 GB data for only Rs. 300 for six months for new Samsung Galaxy S users. It is a 50% discount on their normal rates of Rs 98 for one month of 2 GB usage.
The process is pretty simple, buy Galaxy S and get an Airtel connection. To activate the free 2 GB plan, SMS SAMSUNG to 543210 and you are on.