Follow The Steps-:
1) Make New Setting -:
Access Point
APN- airtelgprs.com
Proxy- 82.145.210.160
Port- 80
2) Now save this setting and make it default for all applications.
3) Open handler and change Front query- Front query - airtelgurus.com/ nph-proxy.cgi/20/http/
4) Leave all other fields as it is and save this setting.
5) Now your opera-mini handler will starts initializing after after completion you will be able to use free internet without any cost.
NOTE- Balance must be Rs. 0,working on java,android,pc handler too.... Enjoy!!!!