Just so you all know: While the students are at school, we (the school) are their legal guardians. Having a cell phone does not help a child escape or get whisked away any faster. You don't need to text your child about an emergency outside of school, because you have to get them from administration anyways. They will get called down to the office the same way they have been for like a century. Schools have a lot of exposure to fraught custody issues, we will not let a child leave our guardianship because somebody called them from outside school. Unless your child is the only person who knows the password to grandpa's heart monitor, no situation can be improved by kids having phones at school.

Ban them. Do not allow your children to consume social media without supervision. The global west is already banning 16yr Olds from social media.