I have a Jitterbug (from GreatCall). It is not a smartphone, but it does exactly what I want. It costs $19.64 a month.

I am so twitchy & scatterbrained that touchscreen interfaces are a continual (not to say continuous) source of furious frustration for me. Using them, I make about one mistake a minute, and then spend a minute figuring out how to recover. The Jitterbug has real keys, like a real telephone. It does not have conniptions because in pressing a key I have brushed some mysteriously significant region with my pinky.

Another sign that GreatCall has the right attitude is that the Jitterbug has a small hole thru which one can attach a lanyard. Portable electronic devices are small, dense, and expensive, easy to drop or to steal. Most of them provide no way to attach them to me.

I should perhaps add that for me a cellphone is for emergencies; it is a convenient substitute for public pay phones, which have almost disappeared. I do not use it to chew the rag. It is true that I sometimes envy people who can access the Internet with their phones, but for me that will have to wait for a more friendly interface.

If you are in my situation, I heartily recommend the Jitterbug.