Turning my child’s phone into a brick

You can regulate lots of things but if you want a phone that will only talk and text, it would be better get your child a feature phone.

Read here for what you can do:

Use parental controls on your child's iPhone, iPad, and iPod touch - Apple Support

Evangelinecan wrote:

I see a lot of questions on this subject, but none of them current. Has Apple come up with anything so that parent can disable a child’s phone except for talk and text. My son has a 12. Mini.

No, not really. If that's what you need, I'd recommend a basic phone.