How to block cell phone signals in the classroom

Received questions

Hello, everyone!How do you see the use of mobile phones in class? I am a middle school teacher. Recently, I found that more and more students use mobile phones in class. In addition to texting, they use their mobile phones to log on to facebook or youtube. I don't think these social apps will help them learn, so I want know how to stop cell phone signals in the classroom now

Second floor

If you want to jammer cell phone signals for students, then I suggest you use a jammer that can blocker 2G 3G 4G signals. Basically interfere with the above signals, the students can only see the blackboard.

signal jammer

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Countries

If you want to know the frequencies of your country, we can offer you some help:

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"Since last year, residents around Yuyao No. 4 Middle School have reported mobile phone signal problems. Some are near Modaoqiao, some are in the mountain temple area, and some are in the east area of Jiangnan New Town." Mr. Mao from the Network Department of China Mobile Yuyao Branch responded.