First connect your phone to PC using data cable.
press on the OK button.After that click on Internet connection
then select add new connnection
You can see the connection ID option being displayed.
Enter the name of the connection
choose country and also the service provider(here Airtel Kerala have been chosen as an example).
Press on the Next button
In the connection type select GPRS.Then press next
Select NO for fall back connection creation
now you can see the Internet connection wizard.Now press Finish
now you can again see the manage your connection tab.Now select the newly created Airtel internet connection.
now you can see the internet connection being established.
Now you can open your Browser and use Internet.