"... children as young as 13 are being treated for digital technology addiction."

But in the US, the problem has become so severe for some families that children as young as 13 are being treated for digital technology addiction.

Source: Children as young as 13 attending ‘smartphone rehab’ as concerns grow over screen time | The Independent

We have a few rules in our house, the main one is that the phone does not go into the bedroom. In fact, no electronics go into the bedroom.