Keep away from Telephone Polution. Telephone Signal Jammer is a device that stops any communication process within phones. Due to the rising number of mobile phone subscribers, there are also rising concerns such as breach of privacy and cheating at tests in schools. Jammers are also used to disrupt communications by outlaws and rebels, which hampers their illegal and violent operations. Phone jammers can also be deployed stop the remote capabilities of mobile phones from causing improvised explosive device (IED) explosions by terrorists