A mobile communication apparatus includes a remote lock and control function. More particularly, after theft or loss of the apparatus, it is possible to remotely lock the apparatus by sending a lock command, e.g. an SMS message. The apparatus may also be controlled to upload information enabling the user to retrieve valuable information stored in the apparatus. The apparatus includes a control unit and registers for controlling the operations of the apparatus, including receiving messages. The apparatus further includes locking means capable of detecting codes in messages received and, responsive to detecting a lock code, sending a lock command to the control unit to render the mobile communication apparatus at least partially inoperable.