Sam's mother needs a larger phone for her failing sight. Leo says that many elderly people don't want a smartphone, they just want a phone to call with. There are plenty of phones out there that are accessible for older folks, like the Jitterbug. It's got huge buttons, an amplified speaker, works with hearing aids, and has a larger screen. It's well designed. Sam can get it from GreatCall.com.
There's other options to consider at phonearena.com