Airtel 3G unlimited trick

Process

1)Recharge with 198 rupees 2G unlimited pack

2) Recharge small 3G pack

3)send "ADD<space><Airtel number>" to 121
      eg:ADD 9000326***    to 121

4) start downloading huge files

5)You will get 3G speed after completion of 3G pack which you are recharged

6) Enjoy 3G unlimited for a month

NOTE :If speed decreases,just recharge another 3G pack