Inarguably, phones have allowed us to communicate easily for decades; why remove them from high schools now? Phones allow students to easily communicate with their friends, parents, or relatives; more importantly though, what if there is an emergency at home? How would a student know that without his / her phone?
Lots of people work well with music and during a work period or a test it can calm the mind and help them think. Plus, they can communicate with parents and friends about times to get together and work on homework. Phones have lots perks and positives just like listening to music and communicating about working times
There is a big difference between adults with cell phones and kids. The adults generally all grew up before the dawn of the smart phone and they learned to communicate face to face. They didn't sit on the school bus with their face in a phone they interacted with the other kids.
Kids need to learn these life skills first, then they can have smart phones.
If cell phones stayed in lockers and backpacks having cell phones at school would be fine. The problem is that they are so misused. Teens are texting or snap-chatting during classes, ringers are going off, and games are being played. They are just another distraction that is taking away from adolescent education.