My children are now adults and live on their own and own smart phones. But we did not buy them cell phones when they were in high school. Why? For no deep reason other than a general family philosophy of not buying stuff unless you really have a need for it.
So both daughters did not get cell phones until they went off to college, and then we bought them the cheapest ones with the cheapest plans and they got smart phones for themselves only later when they needed it for work or graduate school. I myself got my first cell phone just a few years ago as one of their hand-me-downs when they graduated to smart phones, and got a smart phone just last year, again as a hand-me-down when one of my daughters upgraded.
But comedian Louis CK seems to have put a lot of thought into why he doesn’t want to give his own children cell phones.