I put off getting a cell phone for a long time because I didn't want to be getting phone calls when I was out. Answering the phone at work and home was more than enough phone time for me. Driving somewhere in the car was a few moments of peace. I don't want to be bothered when I'm out unless it's an emergency or info I need to know right then (like a change of plans).
My youngest was the only one who had a cell phone in high school. She bought and paid for it all herself. I realized then that teens having cell phones made it harder in a way to keep tabs on then. Before cell phones, if a child was over at someone's house, you'd call the land line there. You'd frequently speak to the parents for a few minutes and would get to know them a bit -- and you could be sure that's where your kid was. With cell phones, your kid can say they're going to a specific place, but if you call them on their cell phone, you only have their word for that's where they are unless you GPS them.
With land lines, when I'd call my brother, my SIL or one of my nephews would likely answer the phone and I'd talk to them for 5-10 minutes before talking to my brother. Now that everyone has their own cell phone, I generally only call my nephews on their birthdays.