I am not a slave to my phone. I use it at work [because they provided it, and I just pay for personal calls] but having a cell phone means getting calls from people at any time of day, on any day, just because they can call you. I do not often respond when at home because I am not paid outside of work hours.
My old phone is gathering dust in a draw where I left it four years ago.
I miss the days of having a pager. If it went off it was an emergency and meant something.
A cell phone is a useful tool for travel, especially with rail/airport delays, and I have it when driving.

And no need to carry around coins for a payphone. (Where does Superman get changed now?)
However, if I go to a bar with friends then I want to have a drink and talk to them face to face, not sit there talking on the phone or texting other people.