Most people should know about phone jammers. Generally, before and after the classroom, when preparing for the exam, the personnel shall be prevented from using mobile phones in the gas station and conference room. This device is not only simple to shield mobile phone signals, but also brings great convenience to people's management in some cases. The installation of the phone jammer may lead to no network signal in an area. Special attention should be paid when using it, but it does not affect the transmission of the base station signal. Nowadays, mobile phones have become people's living habits. This may affect some students. Excessive use of mobile phones will not only affect their eyesight, but also affect their studies. Since the emergence of some shielding devices, some students have been hit by the phenomenon of using mobile phones in school. While it only shields the mobile phone signal, the use of other electronic devices and the signals sent by the base station are not affected. Nowadays, many students have mobile phones and lack self-control. They are too addicted to games and novels. They cheat by using mobile phones in exams. Many schools install it and control it.

The use of phone jammers should be viewed rationally. It transmits the signal of the specified frequency band and shields the mobile signal received by the mobile phone. In this way, the mobile phone cannot connect to the network, and cannot send and receive short messages through the mobile phone, so that the original message cannot be recognized, thus achieving the purpose of shielding. Therefore, the phone jammer will not affect the signal outside the area.