The range of the cell phone jammer is generally 0.5 to 12 meters. Some anti cell scrambler device with relatively powerful functions and high power can block distances of several kilometers, such as mobile phone signal scramble equipment that can interfere with the drone band.
Mobile phone signal scrambling devices will not be allowed to conduct any untimely communication with mobile phones within this radius. For the military police, after using the jammer, the criminal's mobile phone will have no internet, so he will not be able to send or receive text messages, let alone make calls near the jammer. Prohibit the use of these devices in public places, otherwise they will be prosecuted and affect the normal communication of others.
