The college entrance examination and the high school entrance examination are held once a year. At this time, the three major domestic operators will issue reminders: In order to ensure smooth signals near the school, the operator has arranged communication engineers to test the entrances and exits of each examination site and the lounge for parents who send the students to the examination, and to expand the hardware and software of the surrounding base stations to ensure the communication needs of parents in the examination area during the test period. In addition to the mobile signal blocking the data signal, you must also do your best to ensure smooth communication. Every year in the college entrance examination, in order to prevent cheating in the examination, all communication signals in the examination room will be blocked. There are mobile phone signal blockers in the examination room, and common signal blockers: At the same time, there is a wireless communication detector outside the examination room that can help solve the radio wave signals in these frequency bands that the mobile phone signal blocker cannot take care of, and monitor the radio wave signals of unknown origin in real time.

Every year's examination and high school entrance examination, various operators will issue friendly reminders: In order to ensure smooth signals near the school, the operator has arranged communication engineers to test the entrances and exits of each examination site and the lounge for parents who send the students to the examination, and to expand the hardware and software of the surrounding base stations to ensure the communication needs of parents in the examination area during the test period. In addition to signal shielding, you must also do your best to ensure smooth communication. Every year, in order to prevent cheating in the college entrance examination, all communication signals in the examination area will be shielded. There are mobile phone signal blockers in the examination room, and common signal blockers: At the same time, there is a wireless communication detector outside the examination room that can help deal with the radio wave signals of these frequency bands that the mobile phone signal blocker cannot take care of, and monitor the radio wave signals of unknown origin in real time.

Nowadays, mobile phone signal blockers are all full-band. They can shield all 2G3G4G signals and 2.4GWIFI signals and mobile phone Bluetooth signals under the three operators of China Mobile, China Unicom and China Telecom. Its basic principle is to affect the frequency of the mobile phone receiving base station and the working frequency of the router by its own transmission, so as to achieve the purpose of shielding it. 5g jammer