Embodiment of the invention extend to a device (which may be considered an asset which is purchased or which provides a service which may be purchased) which can be controlled through the use of a mobile communications device such as a cellular phone. The cellular phone is connected to a transaction processing system which allows the user to pay for the use of the device. The transaction processing system communicates with the device to allow usage of the device only if the user has successfully paid for such use. A further embodiment of the invention relates to collecting usage information of the device and collating this information at a location remote from the device.