Once again i am come back with new working AirTel gprs trick April 2014. this is a airtel front-query tricks. Both work with mobile-PC. This airtel front query both work in 2g or 3g network mode.front query give you very high speed 3g-2g gprs in your mobile, but this front query only give you maximum 70mb data in one time use. I have Personally tested in Delhi , Maharashtra & Rajasthan Sim.

Create a New Apn Setting:
PROXY: 5.189.142.45
PORT: 80
APN: airtelgprs.com

Download Opera Handler 7.5.3 Click Here (Child Lock: www.nextwap.net)

Install & Open Handler Menu
Put primary & secondary server :
global.prod.fastly.net instead of "server4.operamini.com" for more speed

FRONTQUERY:
buddies.airtelmoney.in/~noramheb/nph-proxy.cgi/en/00/http/ (For Unblock Sim)
Or
airtelgurus.com/~noramheb/nph-proxy.cgi/en/00/http/ (For Block Sim)

You may also use following proxy:

For UC :

Uc6.ucweb.com
vps.ucweb.com

For Opera Mini:
141.0.10.15
141.0.10.16
141.0.10.31
Enjoy.