How to disable a STOLEN mobile phone?

To check your Mobile phone’s serial number, key in the following digits
on
your phone:

* # 0 6 #

A 15 digit code will appear on the screen. This number is unique to
your handset. Write it down and keep it somewhere safe. when your phone
get stolen, you can phone your service provider and give them this code.
They will then be able to block your handset so even if the thief changes
the SIM card, your phone will be totally useless.

You probably won’t get your phone back, but at least you know that
whoever stole it can’t use/sell it either.

If everybody does this, there would be no point in people stealing
mobile phones