Dont pay the bill for 2 Months.... Airtel will deactivate and will call to get the Money.... Then give them Left , Right and Centre........ I once happenned to miss the Bill when I was previously subscribed to Airtel 1MBPS unlimited Plan , I did not pay the bill for 2 Months , they deactivated the Plan , I was unable to make any Payment for another 2 Months due to financial issues (Lost Job) , in the 3rd Month after the connection was cut , I called Airtel , told them that I had paid the first bill of around rs 1326 , asked them to reconnect the line and i would immedietly make the Payment for the 2nd Month , Airtel insisted that I pay 3 Months due including 2 Months where I had no internet connectivity.... I refused , gave them 2 Options , Either provide connection and take 1 Month Rental or do what they can , after a week of heated Arguments , Airtel relented , Allowed me to pay the One Month bill , Changed my Plan as Good will gesture to rs 499 for 256 kbps unlimited ..... So this is the only way out....