I went out alone with my infant and no phone, by accident, last week and I was terrified. How did we live without these things? But there were public phones everywhere. Not any more.
Some public places like airports, etc may have them and I do see one at the local laundromat (35 cents I think). But overall, yes, public phones have disappeared.
Years ago I’d have to call someone from a pay phone to be let into the building where the non-commercial radio station (where I volunteer) is. Now, I use my cell phone...costs me
about 25-50 cents for a quick call. No public phone to use.