That is the main reason I don't have a phone. I know that I'm addicted to the internet and screens, and I know I'd be that guy compulsively picking up my phone

That is the main reason I don't have a phone. I know that I'm addicted to the internet and screens, and I know I'd be that guy compulsively picking up my phone every 30 seconds to see if something is going on. Doubly so if I were in a social situation where it was "easier" to stare at my phone than actually talk to humans. I think of it a lot like a recovering alcoholic not wanting to go into a bar - it's just best to avoid the temptation altogether. It can be inconvenient not have a phone from time to time, but overall I think my life is better without one. Whenever I'm asked for my number and I explain I don't actually have a phone, literally every single person gushes "OMG, I wish I could get rid of mine!". That helps keeps me motivated to deal with the inconvenience. (Like people complaining about horrid hangovers to recovering alcoholics)