To be honest, this trick works only in some part of India. So do comment after trying this Trick. This trick is straight forward, and doesn't require you to have that extra geek knowlege or so :P
- Maintain your balance between Rs. 3 to Rs. 5.
- Activate Mobile Office 3 Rs / 10 MB Pack, around 11:45 to 12:00 in Midnight.
- Balance will be deduced and GPRS/EDGE will be activated, but shortly you 'll receive a message from Airtel stating "Your Request could not be processed, please try after sometime".
- You 'll receive another message stating, 50KB / 30 Paise Plan is activated in your account, Just ignore the message and start surfing. The whole web is at your disposal, and guess what - Its' for Free!