Smartphones are incomparable with other forms of media. You don't have a TV within 3 feet of you 24 hours a day that you can pull out at any time. A TV doesn't ding to get your attention. TV channels aren't individually tailored for you to suck in your attention and hold it for as long as possible. There are fundamental limitations to TV which do not apply to smartphones. It's the same with radio.

I grew up with TV, the number of people spending almost all their free time on a phone completely dwarfs any TV consumption I've ever seen.