The Importance of Installing Examination Signal Jammers in Schools

In order to ensure a focused and distraction-free learning environment, schools have started installing examination signal jammers. These devices are designed to prevent students from using their mobile phones during class, which can negatively impact their learning experience. Examination signal jammers are capable of blocking signals from all three major mobile network operators, as well as Wi-Fi and Bluetooth signals. With the ability to interfere with frequencies emitted by mobile base stations and wireless routers, these jammers provide comprehensive signal blocking across all frequency bands.

Advancements in Signal Jamming Technology:

Examination signal jammers have evolved with the changing times and can now even block 5G signals. These modern jammers are equipped with additional 3.6G and 5.8G antennas, allowing them to effectively block ten different frequency bands, including DCS, CDMA, WCDMA, Wi-Fi, FDD, GSM, TD-SCDMA, TD-LTE, 3.6G, and 5.8G. This ensures the maintenance of a conducive examination environment and upholds the integrity of the testing process.

Addressing Previous Incidents:

One may recall a previous incident during the college entrance examination in Hubei, where a student violated the rules by bringing a mobile phone into the examination hall, taking pictures of the test papers, and sharing them online to seek answers. It is important to note that mobile phones are strictly prohibited in examination halls, and signal jammers are installed to eliminate any possible signals. However, one explanation for the incident was that the 5G signal blocking may not have been effective. This raised doubts among many individuals regarding the capability of current examination signal jammers to block 5G signals.

Signal Jamming Evolution:

Contrary to these doubts, it is essential to understand that examination signal jammers have evolved over the years to keep up with technological advancements. Over a decade ago, during the 3G era, mobile signals were predominantly 3G. At that time, examination signal jammers were only capable of blocking 2G and 3G signals. As 4G technology gradually became widespread, examination signal jammers were upgraded to include 4G frequency bands. In recent years, with the advent of 5G, signal jammers have been further enhanced to effectively block 5G signals.

Factors Affecting Signal Blocking:

However, there are instances where the blocking effect of signal jammers may not be optimal. This is primarily due to variations in signal strength within different locations. Some schools have their own mobile base stations or are located in close proximity to such stations. In such cases, the signal strength within the school premises becomes significantly stronger, thereby reducing the effectiveness of the examination signal jammers. It is important to note that this issue is primarily related to the distance between the base stations and the school, rather than a limitation of the signal jamming devices themselves.


The installation of examination signal jammers in schools plays a crucial role in maintaining a focused and disciplined learning environment. These devices have evolved over time to keep pace with technological advancements, now capable of blocking 5G signals. However, it is important to consider the signal strength within the school premises, as the effectiveness of signal jammers can be influenced by the presence of nearby base stations. By understanding these factors, schools can ensure the successful implementation of signal jamming technology and uphold the integrity of examinations.