Elderly relative unable to use a mobile phone ("What button do I press?"), we managed to get them an old-style dial telephone which works from a SIM card.
Even though it's internally a mobile phone, externally it works exactly like an old dial phone, so the relative's muscle memory lets them instinctively know how to use it π€©
To receive calls you just lift the receiver, then put it down when you've finished. To make calls, you lift receiver and dial. It even has an artificial dialtone added in when you lift to make a call.
The model we bought is the "Opis 60s Mobile", couldn't find anyone else making this though.
p.s. For anyone interested, the manufacturer's web page about their phones is at:
https://opis-tech.com/en/desktop-mobiles