1. In a land mobile radio or cellular radio/telephone communication system that includes a plurality of RF communication channels, a method for detecting unauthorized use of a software application within a communication unit, the method comprises the steps of: a) monitoring, by an RF receiver of a monitoring computer, RF communication channel activity of at least one communication system for a communication involving the communication unit; b) when a communication involving the communication unit is detected, comparing, by the monitoring computer, type of the communication with unique software application identifier for the communication unit; c) when the type of the communication does not match the unique software application identifiers, identifying, by the monitoring computer, that the type of communication involving the communication unit does not match the unique software application identifiers.