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The mobile phone and the base station are connected by radio waves within a certain frequency range, and data and sound transmission are realized at a certain baud rate and modulation. In the working process, the cell phone signal jammer scans from the front to the low end of the channel to the high end at a certain speed. When the mobile phone receives the information signal, the scanning speed will produce garbled interference, and the mobile phone cannot detect the normal data from the base station, which causes the mobile phone to be unable to establish a connection with the base station, thereby achieving the purpose of shielding the mobile phone signal. The mobile phone appears as a network search, no signal, and no service. System and other phenomena.

In short, the mobile phone signal jammer will send out a frequency signal when it is working, which will interfere with the mobile phone receiving the normal frequency sent by the base station, so as to achieve the purpose of shielding.

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