Steps to be followed to track yopur lost phone:

When you buy a new phone the first and foremost thing you have to do is to note down its imei number. If you dont know how to get your imei number you can check here

So when you loose your phone, take your imei number and then mail it to this i.d

cop@vsnl.net

The email should include the following:

Your name:
Address:
Phone model:
Make:
Last used No.:
E-mail for communication:
Missed date:
IMEI No.:

Wish you all good luck with your lost mobile phones, hope this helped you, if yes please leave a comment.

I am sorry to inform you that the invaluable service provided by the Chennai police has been suspended for some unknown reasons, so this service may be helpful or not. So you can try your luck and see.