Hi Shrikant,
I too am using blackberry pearl 8100 unlocked and on airtel.
To use internet, install opera mini by downloading on the computer and copying it to the phone over USB.
change the apn to airtellive.com and blank username and password.
you should be able to access internet using opera mini.
-----------------------------------------
Posted again:
-----------------------------------------
Hi Shrikant,
I too am using blackberry pearl 8100 unlocked and on airtel.
To use internet, install opera mini by downloading on the computer and copying it to the phone over USB.
change the apn to airtellive.com and blank username and password.
you should be able to access internet using opera mini.