CHECK THIS LATEST AIRTEL IMEI NUMBERS THAT GIVE 1GB AND 2GB

FOR 1GB IMEI NUMBER.

1.   Change the IMEI number of your phone to 8616480008331005

2.   So, you just have to change last four numbers. That's all.

3.   Restart your phone and goto your text message and send 3G to 141

FOR 2GB IMEI NUMBER

Do the same thing you did for the 1GB IMEI Number

This is the 2GB IMEI Number you have to change 351649060932281

Then Send JOIN to 141

Enjoy!