Block Unknown Numbers On A Cell Phone Prevents Cheating

Perfectjammer 2022/05/22

Cell phone jammers have been trusted by exam rooms, schools, prisons and other units since their inception. In recent years, the phenomenon of cheating with mobile phones has occurred in various national examinations, which has seriously affected the fairness and justice of the examination. To this end, the state stipulates that Block Unknown Numbers On A Cell Phone should be equipped during major examinations to create a healthy and fair examination environment for candidates. Therefore, the mobile phone jammer came into everyone's sight, and learned that cell phone jammer is used by candidates to cheat by using their mobile phones. I believe that those who have experienced large-scale exams are not very unfamiliar, and they will hear about the test room before the exam. Cell phone signal jammers may be installed, and some test centers will inform candidates in advance, so that candidates know that cell phone signal jammers are installed in the test room and must not be careful.

The arrival of the 5G era has brought great convenience to people, and the speed of mobile phone networks has increased to a new level. But it also caused some problems. In 2021, a college entrance examination candidate in Hubei Province took a picture of the question with a mobile phone and uploaded it to the search APP to find the answer. The college entrance examination room is usually turned on Block Unknown Numbers On A Cell Phone , so why does the candidate's mobile phone still have a signal? The reason lies in 5G. A cell phone has a signal because it can connect to a base station via radio waves. Complete data and sound transmission with a certain baud rate and modulation. What the shielding device needs to do is to scan from the low-end frequency band to the high-end frequency band at a certain speed during the normal connection between the mobile phone and the base station. When the mobile phone receives signals, garbled interference is formed. The mobile phone cannot detect the data sent by the base station, so it cannot be established. connected, no signal.

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