This is what I'd suggest, too, for sure. Just don't use the Phone app at all, if it's causing issues. My Mom, who is 75, routinely uses Siri for all kinds of s

This is what I'd suggest, too, for sure. Just don't use the Phone app at all, if it's causing issues. My Mom, who is 75, routinely uses Siri for all kinds of stuff. She's taken to it quite naturally and it seems to work extremely well for her. If you're using a voice interface, shaky hands become irrelevant!