Anyone who has experienced exams should be aware of signal jammers, which usually appear in front and back of the classroom. When entering the exam room for inspection, they will find traces of the exam room's shielding device. It's not just about simply blocking mobile phone signals, it's more about providing candidates with a level playing field. The installation of signal jammers may result in a lack of network signal in an area, but it will not affect the transmission of base station signals at all.

Nowadays, mobile phones have become a common habit of people's lives. This may have an impact on some students with poor self-control, as excessive use of mobile phones indiscriminately can not only affect vision, but also affect academic performance. It may have an impact on some students, as excessive use of mobile phones not only affects vision, but may also affect academic performance. Since the use of blockers in schools, the phenomenon of some students using mobile phones has gradually decreased. The signal jammer only blocks mobile phone signals, and the use of other electronic devices and the signals emitted by the base station are not affected. Nowadays, many students mostly have mobile phones and lack self-control. They become addicted to games and novels, cheat during exams, and many schools install signal jammers to regulate their behavior.
The use of signal jammers should be viewed rationally. Sending signals in the specified frequency band blocks the mobile signals received by the phone, making it unable to connect to the network and send and receive short messages through the phone, making the original message unrecognizable, thus achieving the purpose of blocking. Therefore, it does not affect signals outside the area.