I agree with her but it shouldnt come as an alternative to the parent enforcing phone boundaries.
Im usually shouted down on this site when I say that I dont agree with kids having smart phones. Its not comparable to books and tv as someone said above, they are regulated to some degree. The internet isnt really and that is accessible to kids via a phone if not by computers at home too, most parents dont understandthat kids get round the controls
Brick phones are enough and as a culture we have sleep walked into a situation where we are exposing our children to things that they cannot control, they cant manage or effectively risk assess etc.
The examples above of schools making kids use apps or smart phones is part of the problem, as per transport making it impossible not to use them. All of that needs to change with a culture of no phones for kids so that its easier to enforce.
If you say to your own child, you're not having this, even if they dont need an app for lessons or the bus, they have exposure to unregulated and unlimited internet via their friends so it needs to be all schools and all parents who do this.