Does the school allow cell phones in school? If so, why?

Relying on parents to somehow prevent their kids from doing what all their peers are doing, I'm not surprised this is a fight parents choose not to have, or don't know how to win, or don't have the energy for.

Can the school "be bothered" to try to do something at the school level, that will effect the entire peer group, instead of hoping that parents will find a way to swim against the stream? There might be other ways than simply prohibiting phones. Or maybe the school "can't be bothered" to try?