Buddies is your sim locked?
just sent the sms to the following number

PUK Sim No. to 53733

sim no will be at your back of your sim card..
also if your sim is locked then just enter the PUK code then enter ok then enter 0000 then enter 0000 after this you will be able to unlock you BSNL sim{WWW.AIRTELTRICKZ.MOBIE.IN}