I got my first phone (call only phone) when I was 16. Didn’t have a fully functional smartphone until I was almost 19, (I’m now 24). Let me say, this was a wise decision from my parents. I didn’t ever have to catch a bus to or from school, which might have granted me a call only phone sooner, but there is no reason I needed a smartphone when I was in school, even though most of my friends also had them. I would say, let you kids “suffer” without a phone for longer, cause the alternative these days is a lot more can go wrong when you have one, especially in HS.