Should students have cellphone in the school?

It is important to have your cell phone in school. I think it is important to have in school to have for many reasons. One reason is if something dangerous would happen at the school, you could contact your parents. It is also important to contact other students if they need to know missing homework or assignments. There would have to be restrictions to having the cell phones, such as keeping it on vibrate so it doesnt disrupt the class, or else it could be taken away, but it definitely should be allowed in school, and it is important o have in school.