A useful trick for Airtel customers.

Recently I found a very funny yet useful trick for Airtel customers.
We all know about MNP, Mobile Number Portability. The trick is related to that. First you have to send a sms to 1900 in the following format:
PORT Your mobile number
and send it to 1900. A reply will come from 1901 with a unique number which will be needed for the portability. It has a certain time limit for use. Now comes the best part. Within two or three days a person from Airtel will call you AMD will offer you some special pack for free depending on your reason for portability. Like, if you want a better data plan or voice tariff reduction, they probably offer you some thing better. I have my friends who got this facility and enjoying.
May this be helpful.