No matter what kind of test it is, fairness is the most important for each candidate, so preventing candidates from cheating in the examination room is the top priority of the examination staff. There are many ways to cheat. The most common way is to cheat in the exam by using various communication tools. In order to put an end to this phenomenon, the mobile phone signal jammer plays a vital role in the exam room.

How does the mobile phone signal jammer interfere with the mobile phone signal? It turns out that during operation, the mobile phone signal jammer scans the low-frequency band of the forward channel to the high-frequency band at a certain rate, and transmits white noise interference signals to interfere with the signal that the mobile phone receives messages, so that the mobile phone can not normally detect the data connection sent by the base station, thus unable to establish a connection with the base station. The mobile phone shows no signal, limited service and other states. To a certain extent, it can effectively prevent candidates from using various cheating devices to cheat, and maintain the fairness of the exam.