I found a phenomenon: the mobile phone signal will be particularly poor when it comes to the exam, why is this?

Hello, I would like to reflect on one thing. Our school is taking an exam recently. When I am close to the classroom, the mobile phone signal will become very poor, and I can't even talk. Why is this?

Topsignaljammer  2022.

In today's life, 4G network and WIFI network have become indispensable things in life. All mobile phones and computers must go through this channel if they want to connect to the Internet. It can be said that there is no 4G network and WIFI network, mobile phones and computers. There is no ability to contact the outside world. However, 4G network and WIFI network have brought great convenience to our life, and some people try to use this convenience to choose to cheat in the examination room.

Generally, schools will install cell phone blocker. The frequency bands of 4G signals and WIFI signals are between 800MH and 26000MH, and the test signal jammer is a device that can effectively block all communication signals in this frequency range, so whether it is 4G signal or WIFI signal, it doesn't matter. And now facing the arrival of the college entrance examination, some candidates who do not focus on their studies and want to cheat by illegal means, the mobile phone signal blocker is undoubtedly a powerful tool to break their intentions, which can maintain the normal order of the examination room and let the students in the examination room. Candidates can take the exam with peace of mind, and there is no noise during the use of this device, which can ensure that it will not disturb the exam process of candidates. For many friends who have needs for mobile phone signal jammers, choosing a professional and high-performance device is not a child's play. It is necessary to find a professional manufacturer to provide it.