If you work as an information worker employee not having a smartphone is likely impossible.
nostr:npub1fl7pr0azlpgk469u034lsgn46dvwguz9g339p03dpetp9cs5pq5qxzeknp has the right idea to define the usage and use it as a tool.
Also, moving activity (like nostr) to a laptop helps a lot. It creates a barrier.
Once you have defined what you are doing with it, you can start defining what you might do instead.
I wouldn’t be surprised if people focus on smart phones, but totally forget to sum up the total amount of screen time across video games, work computer, TV, etc.
My childless direct reports think I’m eccentric b/c of all the things I get done on the weekend, and I have to wonder, what the heck are they doing with their time?