Here is the Trick For Airtel
Customers to Activate free callrate
Reducing offer.
Airtel-Airtel=30ps/min, Other=40ps/
min, STD=50ps/min.
To Activate this Trick
Dial: 51570 (free)
Then select language then press 1.
Offer Activated Successfully.
Enjoy it before they block this offer..
(working only in Kerela)