You don't treat the symptoms; you treat the cause. dumbphones, minimalist phones, and crippled smartphones are as effective as a smoker throwing away a full pack, only to buy a new one when stressed or drunk. If you use doomscrolling as an escape, you will inevitably fall back to it when life hits. While a few may manage to change their habits with a restricted device if the stars align for long enough, it won't work for most. You need to first figure out why you do it.
This isn't universal but will tremendously help quitting. There will still be the nicotine issue, but it will help clear the other factors that can be as powerful as the physical addiction.
The cause why you started smoking might have gone away but you are still addicted to the substance. We don't have the same chemical addiction with doom scrolling.
