I am using old nokia phone for 3 months now, I am not going back to my iphone. (means no whatsapp, banking, uber, reddit, hn, whatever)
It took almost 1 week to get rid of the cravings "I am slightly bored, I *MUST* look at my phone"
Now, I am just bored, I had forgotten how nice it is to be bored, I just stare at things, poke something with a stick, look for patterns, ask questions, have ideas.. etc; when I have a meeting and the other person doesn't show up on time, I just watch the world and wait.
I also noticed I can watch movies properly, I have more patience, I dont look at my phone at the first "less exciting" moment. It is really nice especially for things like Star Trek where they have not algorithmically optimized every frame to keep you engaged because they were not competing with instagram for your attention.
I even bought a walkman. When the song is not very good, I just wait it out. Very quickly I got my sense of time back, just after few days I can measure time in 'songs' or 'cassette sides'.
I have also blocked all socials except hn on my local pihole.
If you survive the first week of cravings after that it gets nicer every day!
Some people say I am doing those things because of "nostalgia" but this is incorrect, I just want to be able to be bored.