Apparatus for selectively enabling functionality of a machine having a first state, wherein some or all of the functionality associated with the machine is selectively disabled, the apparatus comprising: an input for a user to select the disabled functionality; a transmitter for sending an SMS message in response to a user input at the input means; a controller for generating a control signal associated with the sending of the SMS message, the control signal configured to place the machine in a second active state in which some or all of the functionality associated with the machine is selectively enabled.