I never understood why people brought phones to school ever since Middle School and now during High School
Some kids have parents that go to work, and their parents want them to keep in touch after school to make sure the kid isn't screwing around.
In my opinion, kids should be fully able to have phones, but not in class. In an assembly, it's totally okay (in my opinion) but in class you need to listen and work.
Teachers shouldn't be able to confiscate phones, either. Kids don't usually have a PIN to their phone and teachers can do bad things to their phones, or lose them themselves.