Protection of a wireless communications device against unauthorized use

A method for protecting a wireless communications device against unauthorized use of functionality provided by the wireless communications device, the method comprising: receiving a binding command to bind the wireless communications device to a subscription identification module operationally coupled to the wireless communications device and associated with a subscription to a communications service; responsive to the received command, storing a module identifier identifying the subscription identification module; and storing a device identifier identifying the wireless communications device; obtaining an unbind code and storing the obtained unbind code; performing a module verification verifying that a subscription identification module identified by a stored module identifier is operationally coupled to the wireless communications device, performing a device verification verifying whether a wireless communications device identified by a stored device identifier is operationally coupled to the subscription identification module; and preventing operation of at least a part of said functionality unless the module verification and the device verification have been performed successfully.