I am a teacher and my students always like to use mobile phones in class. How can I ban GSM signals to prevent them from using their phones for long periods of time?
According to your situation, I recommend your school to purchase a batch of interference equipment to build a blocking network.
The benefits are quick results, low cost, and maneuverability. Of course, since 4G is now mainstream, it is recommended that you buy GSM jammer with 4G capabilities.