I have 3 daughters. This is kinda working for us, with ongoing negotiation.

- No phones before 8th grade

- Phones start out locked down (talk/text only)

- Enable select apps (e.g. Camera, Duolingo) with proven responsible behavior.

- No social media apps or accounts

- Youtube and similar are blocked at the router at home

- Computer (Chromebook) use is supervised, mostly

- No phones when you have a group of friends over. Yes I will confiscate them.