so lets start
First create a manual gprs setting from your mobile phones.

name-Airteltrickz.com
Apn-aircelwap
proxy-37.228.107.253
port-80
And save it.
and use this setting is your default setting.
Now download below attached symbian opera and install it.
after installtion if ask then select socket
and let the opera load

now BINGO...

You can enjoy free gprs in 2G AND 3G mood.
oupeng_v6.6_s60v3v5_aircel_wiki.sis