For BSNL, APN: bsnlnet
Don’t enter anything in Username & Password.
4) Restart your iPad 3G. If everything goes well, you will be able to enjoy 3G services on your iPad.
Lets mark your problems what you know via in the comment section.
Note: You should have an appropriate plan activated for the uninterrupted data packets. Otherwise, you will get ‘safari cannot open the page’ error.