I am surprised at all the supporters of smartphones for kids.
I am a parent of two teens and 1-pre teen and smartphones are an absolute disaster for kids. Sure, all the social anxiety and teen drama has been around for ever, but when I was a teen, you "unplugged" from it at home and on the weekends. Now for many teens it is like a 24/7 IV plugged into their mind causing manipulation and anxiety.
I try to monitor it..but unplugging them causes social isolation. Its terrible.