Here's How To Do It: (from our partner source: solidblogger.com)
IMEI stands for International Mobile Equipment Identification. All mobile handsets are assigned unique IMEI numbers and no two mobile handsets share the same IMEI number, even by mistake! You can find your mobile handset’s IMEI number by typing *#06# on your mobile. Since this number is unique, it will help us in locating your lost or stolen mobile handset. For now, note down this IMEI number and keep in a safe place. You can also find your mobile IMEI number on your mobile handset packet cover.
How to block your lost or stolen mobile handset using IMEI number
When you switch on our mobile phone, your mobile SIM card tries to connect with any available network. Once it finds a supported network it tries to build a network connection between your mobile handset and the nearest tower. During this connection negotiation, your SIM transfers some internal information to the network operator such as your mobile IMEI number, mobile model, version etc. This means your mobile operator keeps the record of your mobile handset number each time you try to switch on your mobile handset and use their service
Now if you have lost your mobile handset or your phone has been stolen, you can contact your network provider to block your IMEI number. They might ask you to get a Police FIR copy first, do as they say and finally ask them to block your IMEI number. Mobile network providers use a shared hosting service for blocking IMEI numbers, which means if you have asked network ‘Airtel’ to block your mobile handset, it automatically gets blocked by network ‘VodaFone’, ‘Reliance’, ‘Idea Cellular’ and so on.
Now when that thief will switch on your mobile handset, no service providers will allow it to build any connection with them. It does not matter if he changes the mobile SIM card, since SIM card requests for the service with IMEI number and a blocked IMEI number handset will be ignored and the mobile will become an useless toy.
If you know someone from any mobile network, you can also ask him to find out the mobile number that’s being used that IMEI number. In that way you will get the mobile number that thief is using on your handset Take help of mobile number tracker to track any mobile number in India.
You can find more information about your mobile handset by entering your mobile IMEI no. Go to IMEI Number Analysis and know more about your handset model, manufacturing date and some internal informations for free.