I've had students refuse to comply before. It has happened to nearly every teacher. You inform the student that they will be punished, and that if they continue, they will continue to be punished.

You have to know what kind of student you're dealing with, too. If I knew it was the type of kid who wouldn't hand over her phone, I wouldn't have even asked. I would have told her that I was writing her up for having it out, and every time I look over, if I see it still out, I'm writing her up again.

Nothing she could have been doing could have been *that* disruptive. There are ways of handling that situation-- teachers, admins, police all need to be smarter.