Doro is a brand that produces products that help the aged.
My Doro 810 phone (not smart) has been the best I have so far owned. Reasonable size keys for texting and a bright screen with a large font. It even has "emergency contact" and "carer" remote management features. There is a charger stand so you don't have to fiddle with the micro-USB connector. The clam case shape and texture makes it easy to handle - my previous "pretty" phone was like a slippery bar of soap.
Reaching the biblical life span hasn't affected my ability to trouble-shoot and program. I retired because the irregular hours and stress were obviously damaging my health. Youngsters thought that cutting corners was a quicker way to advance their careers - so I left them to it.