Signal blockers or inhibitors, also known as Jammers, are devices that generate interference or intentional disruption of communication in order to prevent exchange of information. In this case, the interference of the radio signal prevents the communication between the mobile terminal and the radio station. Its use causes extensive disruption and alteration of cellular signal, while affecting the coverage, as well as a deteriorating service for customers. Moreover, when inhibitors production processes and installation is not strictly controlled, problems of interference may increase. In some cases, mobile users may be unaware of its terminals being blocked since the above may not be obvious until they make a call, when they would receive the warning that network is not available, thus seeing their rights to access services impaired while not receiving any communication on their mobile until they leave affected area.