In my area it's becoming very popular for schools (middle and high) to restrict phones. They put them in the pouch things. I'm a bit surprised how much the parents support it. Talking to a local journalist he said he couldn't find parents with good arguments against it. One of them was "my son runs an online business and needs access to his phone for it".
I couldn't get a cell until I had a driver's license, which I think made sense at the time. Today, a kid might be alienated without a phone.