You might try contacting the school in this article [1], which has banned phones. Or this one [2], which has done the same. And this article [3] mentions a few more.
I took those links from an article in The Atlantic [4] Get Phones Out of Schools Now, which you might find interesting.
EDIT to add that The Atlantic article has a comment thread on HN [5].
[1] https://eu.news-leader.com/story/news/education/2022/04/01/m...
[2] https://triblive.com/local/penn-hills/no-cell-phones-for-pen...
[3] https://www.cbsnews.com/boston/news/massachusetts-schools-ce...
[4] https://www.theatlantic.com/ideas/archive/2023/06/ban-smartp...