When they’re small, maybe. But once they’re at an age where the device represents a portal to social engagement, I find a complete weekend-and-next social cycle basically approaches infinity in their eyes. A week is usually sufficient, but there’s been times where two is necessary. However, each of my kids differ with effectiveness of different punishment types.

No, even when they're 15.

That shirt ten minute time out tells them that their behaviour is wrong and needs to be fixed. It's tied to the actual behaviour that needs to be fixed. It prevents an argument spanning a week.

It's punishment for a 12 year old not a 2 year old...

My advice holds for anyone up to the age of about 18.

Have you had kids over the age of 2? Because your advice doesn’t hold for anyone over that age.

I don't think it is that simple depending on the age.

I'm willing to bet a 10 year old wouldn't think much of 10 minutes without a phone.