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].
Maybe I should look for cases where smartphone bans on school/village/town level and but them all together in a link list.