Why are more and more schools using cell phone jammers

Hello Violet

As you said, it is true that more and more schools are installing cell phone jammer. Of course, the main function is to prevent students from using mobile phones. There are two main reasons for this:

1.Prevent students from using mobile phones to cheat in exams. That's the main reason

2.Prevent students from myopia caused by excessive use of mobile phones. Now more and more students are near-sighted, the fundamental reason is because of using mobile phones for a long time.