Hi Vivek Ram, Sad to hear about your loss of mobile phone. Yes, you have to digest the hard truth that its not possible to track your mobile down. More over the other sad story is that its not that easy to get the IMEI number of your mobile blocked here and its a very long and tedious procedure as all the service providers need to blacklist that IMEI number. So though its said in the manual and everywhere else that the IMEI can be used for this purpose to prevent unauthorised use, but its virtually a useless stuff here though this facility is easy to implement in other countries. The other thing is that these mobile phone do not come with any trackin devices built in it so its not possible to track the exact location of the Mobile. Yes it is possible for your service provider to tell the region i.e the cell/tower your mobile last operated in, but all this is not worth the pain. So just over come it. Forget your lost handset, and purchase a new one. Get your old sim blocked and get a duplicate sim of the same number from the service provider buy paying the minimum amount for the sim and showin valid documents to prove your ownership.