It will not work by default, they will tell you all kinds of stories on 121 and 7070. The reason they dont give support is that they want you to but the data modem separately.
Few things you can do to make it work...assuing you have 899 unlimited plan activated...
1. Call 121 and get to the point of harassment or get your call transferred to a supervisor and make force them to activate GPRS or Mobile Office as they call it on your number. It has to be activated separately by 121 not 7070.
2.
Enter the initialization command:
- From your computer, click Start.
- Click Control Panel.
- click Phone and Modem Options.
- Click the Modems tab.
- Scroll to Standard Modem(or Standard modem over bluetooth if using over bluetooth).
- Click Properties.
- Click the Advanced tab.
- In the Extra Initialization Command field, enter the following:
+cdgcont=1,"IP","airtelgprs.com"
Incase you are using windows 7 you wont be able to change this using the above steps, instead go to Device manager>Modems>Standard Modem(or Standard modem over bluetooth if using over bluetooth)>Right Click>Properties>Advanced Tab then insert the same Extra Initialization Command as stated above.
When setting up dialup connection dial number *99#
Hope this works, let me know if you still have problem connecting, speeds wil be very low though.