The cell phone signal jammer function is used to block signals and is used in many situations. The examination room is the place where we come into contact with more use. Information is transferred very quickly these days. With mobile devices, all kinds of information can be transmitted to every corner instantly. For some situations where information cannot be transmitted, mobile phone signal blocking is very necessary. Let us introduce the principles and functions of mobile phone signal jammers.


The principle of mobile phone (radio communication) is as follows: within a certain frequency range, the mobile phone and the base station are connected through radio waves, and data and sound are transmitted through a certain baud rate and modulation method.

cell phone blocker

According to the above communication principle, the shielding device scans the high-end channel of the low-end frequency at a certain speed. The scanning speed will form disordered code interference in the newspaper signal received by the mobile phone, making it impossible to detect normal data sent by the base station, making it impossible for the mobile phone to establish contact with the base station. Mobile phones show symptoms such as searching the network, no signal, and no service system.


It only blocks mobile phone signals and does not affect the normal operation of other electronic devices.

It only blocks mobile phone signals in the examination room and will not interfere with mobile phones outside the examination room, let alone base stations.

Without affecting the uplink frequency, only the downlink frequency of the transmitting base station is blocked.

The intensity of the electromagnetic field is far below the standard and has no effect on the human body.

Easy to operate, the antenna is installed correctly and the power supply is automatically connected.

Features of using cell phone signal jammer:

1. Select the area where the mobile phone signal needs to be cut off and place the cutter on the table or wall.

2. After the installation is completed, connect the power supply of the disconnector and turn on the power switch.

3. After connecting the device, press the power switch disconnector. At this time, all mobile phones turned on at the scene are in the state of searching for the network, and the base station signal is lost. None of the calls could establish phone contact.