Comment on Ramiro Onate's post: I would have a 1 on 1 official conference with the student and explore the reasons why he is unwilling to adhere to the rules. Troubleshoot alternatives...if a conversation is necessary due to a true family emergency, then step out of the room. If the student has issues with paying attention, holding a "fidget toy" or (better) taking notes during class can be helpful to give them something to do.
That said, it needs to be clear that the current behavior cannot continue. It helps if you have a catalog or handbook that outlines… >>>