Under this offer there is no need of talktime to give a missed call to other Airtel number to connect to their family and friends.
If the customer having less than Rs.1 on their account can send a toll-free SMS to 121 by typing CALL and send SMS to 121 to expect call from other number. After successful sending SMS recipient number will get an SMS as “Please call me back. Thank You”. This service can be availed by Airtel customers to connect family and friends under NIL balance.