Full procedure to unblock your airtel sim: Try now

Here's the full procedure to unblock the sim.. 
The suggestions and ideas belong to a friend and it worked for him.
 
Recharge ur phone with 20Rs.. 
Now
dial *567# and
activate 10Rs plan..
 
After it gets expired (one day).. 
Dial *567*11# and activate 'zero' rental plan..
If phone is blocked still then, 
put ur sim in a black and white phone and
put another airtel sim in ur gprs enabled handset.. 

Now new settings will come.. Save them all.. Activate
mobile office and Try airtel gprs tricks.. 

If its working put the 1st airtel sim
(that u put in black and white set)..

Now new configuration settings will
come.. 
Now activate mobile office..
And try airtel tricks.. 

For eg: use thisas real host
121.241.248.6 which is working all over India.