Every mobile phone has an IMEI (International Mobile Equipment Identity) number. This number is the equivalent of a chassis number on a vehicle. It is the serial number for your phone handset which is unique to that device. It is very important that you make a note of the IMEI number so that, if your phone is lost or stolen, you can give this number to the police when reporting it. The easiest way to find your IMEI number is to type *#06# into your handset. The number should then be displayed on your screen. Write it down and keep it somewhere safe. Passing on this number when reporting the loss/theft will help to prevent the phone being used by a criminal in the future.