Hi guys
I also tried a lot to access free gprs through airtel and AT LAST only this trick worked :
1. Dial *567# from your mobile to activate ZERO RENTAL PLAN (30p/50kb)
2.Keep the balance of your phone neither more than 30 paise nor less than 0 (or minus).
3.Connect your phone to pc and use dial up connection by using *99# no.
4.Download a software name YOUR-FREEDOM from *www.your-freedom.de (from any net cafe)
5.In your-freedom
a) Select the language as english
b)cancel the wizard which pops up
c)click on configure ------>>> (img y1)
d)click on wizard and then click on next
e)it will search for proxy servers......select any one of them and then click on save and exit
f)click on start connection
PROXY SETTINGS FOR BROWSERS
proxy- 127.0.0.1 port 8080
CHECK IT OUT IF IT WORKS FOR YOU