Almost everyone knows the mobile phone signal jammer. Basically, those who have taken the exam should understand it. Generally, before and after the classroom, the trace of mobile phone signal jammer will be found when entering the examination. It is not only simple to shield mobile phone signals, but also to give candidates a fair competition environment. The installation of mobile phone signal jammer may lead to no network signal in an area, but it will not affect the transmission of base station signal at all.

The use of mobile phone signal jammer should be viewed rationally. Send the signal of the specified frequency band and shield the mobile signal received by the mobile phone, so that the mobile phone can not connect to the network and can not send and receive short messages through the mobile phone, so that the original message can not be recognized, so as to achieve the purpose of shielding, so the Mobile Phone Signal Jammer will not affect the signals outside the area.