Yes,we can trace our stolen or missing mobile by using IMEI(International Mobile Equipment Identity number)number.If you don't know your IMEI number.Press *#06# in your mobile hand set, IMEI number will be displayed on your mobile hand set.Keep it safely. This number is unique number for each mobile.
In case of your Mobile stolen, you need to do these things.
1. Lodge FIR for your stolen mobile hand set.In FIR please get it note IMEI Number, Color , Make & Date of Purchase.
2. Ask your service provider to block your SIM Card. If stolen mobile is switched off service provider can't trace it.
3. Now tell them your hand set IMEI number they will lock your hand set & get it traced.
All the Best