Here is a trick to get Unlimited 3G on 2G Unlimited Pack
1. First Recharge with any 2g monthly unlimted plan.
2. Then Recharge with 3g plan.
3. Send A msg ADD <airtel number> to 121.
4. Congrats now you can use unlimited 3G even after your pack exhausted !
Awesome Isn’t It?
Tested and Verified in Many States in India