How do I stop students from using their phones for extended periods of time? This affects their learning, how can I deal with this?

For parents, in addition to their children's health, parents pay more attention to their children's academic performance and intellectual development. However, children's long-term exposure to smartphones will not only affect children's learning, but even affect their intellectual development. I don't know how to deal with this situation, is there any solution?

Topsignaljammer  2022.

With the advent of the summer vacation, primary and secondary schools all over the world began to have holidays, and the tests for parents came one after another. What should children do if they are addicted to chatting on mobile phones, what should children do if they don’t have a good rest and play mobile games in the middle of the night? How to do? These are the most questions I've been getting recently. When encountering such consultations, I generally recommend parents to communicate with their children so that they can learn self-discipline. However, some parents have also reflected the actual difficulties and hope to purchase a cell phone jammer for home use to interfere/interrupt the mobile phone signal. Yesterday, a brother hoped that his sister could concentrate on her studies, and he sacrificed the fun of playing with his mobile phone to buy a mobile phone signal jammer, and his heart was still very warm!