Can signal jammers be used in the classroom?

I am an examiner. During the exam, I found that many students are using mobile phones to find answers on the Internet and use mobile phones to cheat. Can I use a signal jammer to block mobile phone communication so that the mobile phone cannot access the Internet?

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Topsignaljammer  2022.

Hello, if you are trying to prevent students from cheating in the exam room, you can use a signal jammer, because the signal jammer can indeed block the signal communication, so that the mobile phone can't access the Internet, but if people use mobile phones under normal circumstances , then I do not recommend you to use it because you cannot hinder the freedom of communication of others.