Mobile signal blockers are used in exam rooms to block or interfere with mobile signals, and their functions mainly include the following four points:

1. Preventing Cheating: By blocking mobile phone signals, candidates can effectively prevent using their phones to cheat during exams. This includes behaviors such as receiving external information and searching for answers, which helps ensure the fairness of exams and the honesty of students.

2. Maintaining order in the exam room: Preventing interference factors such as ringing tones, vibrations, or text messages from mobile phones during the exam process helps to maintain the quietness and order of the exam room, providing a good exam environment.

3. Prevent the use of communication tools: By blocking mobile phone signals, candidates can be prevented from using mobile communication tools, avoiding improper communication during exams, and ensuring the purity of the exam.

4. Preventing Cheating Devices: Some modern cheating methods may involve the use of wireless communication devices, such as headphones, to receive answers. Blocking mobile phone signals can reduce the likelihood of such cheating behavior.

Although mobile signal blockers play a certain role in preventing cheating and maintaining order in the exam room, the following points should be noted when using them:

Legal compliance: In some regions, the use of mobile signal blockers may be illegal or restricted. Before use, it is necessary to understand and comply with relevant regulations.

Communication interference: The signal blocker may interfere with normal mobile communication in the surrounding area. Therefore, caution should be exercised when using to avoid affecting the communication of unrelated personnel.

Technical feasibility: Some advanced mobile signal blockers may be able to cover frequency bands, while some simple devices may only be able to block specific frequency bands. When using, it is necessary to ensure that its technical capabilities meet the requirements.