I have lived 4 years of my adult life phone free. It was quite liberating. I know have a phone because I am working on an iOS app (and I enjoy having a phone as well so far)

But I think I might go back to having no phone next year. I would not define myself as "the guy who has no phone", and I definitely allow myself to change my mind, it's not for tracking or privacy reasons, mostly that sometimes I feel the need to be a lot more creative and explorative than social. Remove a phone from your life can definitely make you see the world differently.