A method and device for controlling the operability of a transmitter on a mobile communications device by determining if the mobile communications device is located proximate to an operator's seat of a vehicle. A condition parameter of the mobile communications device may be determined. The transmitter on the mobile communications device may be disabled in response to the mobile communications device being located proximate to an operator's seat of a vehicle and further in response to the determined condition parameter. The transmitter on the mobile communications device may be enabled, in response to determining that the mobile communications device is not located in a restricted location.