GSM jammer to prevent cheating?

Hello Adelaide!
Yes, in Japan, China and some southeast Asian countries have already applied cell phone signal jammer to education. In order to prevent students from being distracted in class and cheating in exams. Currently, some U.S. states are trying to install jammers in schools. To prevent students from cheating and using mobile phones to do something illegal. The current federal law does not specify the legality of using jammers in schools. But the specific laws of each state vary, and if you want to use it, you can refer to the state law.