This article will explain how to enable or disable IMEI Blocking. IMEI Blocking is a method to block use of a mobile handset that has been reported as lost or stolen by its owner.
An IMEI (International Mobile Equipment Identity) Number is a unique code assigned to your mobile handset. When IMEI Blocking is enabled, the handset cannot be used on any Australian network, except to call Emergency Services by dialling 112.
If you've recovered your lost/stolen handset, you may need your IMEI number in order to get IMEI blocking disabled.
On recent iPhone models, you’ll find the IMEI Number printed on the ejected SIM card tray: