I had a Sonim XP3 "dumb phone" that I used for a year and successfully drove my screen time down from 1-2 hours per day to <10min.
The key for me was that the input (T-9 keyboard) and output (tiny non-touch display) modalities were so constrained that any task that wasn't completely trivial was made so painful that I would put it off until I was in front of a computer, if I did it at all. This was a great way to filter out tasks that weren't truly important enough to work on immediately in the moment.
The downfall was my new job which required travel for work, which meant needing a phone capable of managing flights, navigation, and coordinating with my coworkers.
If my circumstances change, I fully intend to switch back to the XP3 or something similar.
I do wish there was something available that could perform those tasks I need for work, but not give me the "full throughput" to get distracted.
The key for me was that the input (T-9 keyboard) and output (tiny non-touch display) modalities were so constrained that any task that wasn't completely trivial was made so painful that I would put it off until I was in front of a computer, if I did it at all. This was a great way to filter out tasks that weren't truly important enough to work on immediately in the moment.
The downfall was my new job which required travel for work, which meant needing a phone capable of managing flights, navigation, and coordinating with my coworkers.
If my circumstances change, I fully intend to switch back to the XP3 or something similar.
I do wish there was something available that could perform those tasks I need for work, but not give me the "full throughput" to get distracted.