What's a good cellphone for a technophobe who needs reading glasses?

I want to ease my wife into the tech world a step at a time. Last Christmas, our son gave her a Kindle Fire, and she will use it. This Christmas I’d like to get her a cellphone. She doesn’t have the patience or inclination to use a ton of features. I just want her to be able to call me when she’s out shopping and finds a real steal but needs someone to play mule and lug it home for her. She’s passed up a couple of opportunities to grab a real bargain because it was simply too big and bulky for her to bring home. I’d also like her to have a phone for safety sake. Neither of us are spring chickens anymore.

Before I got my cataract surgery, I had to give up using my cell phone because I couldn’t see the function keys and tiny icons on the display well enough to even make a call. She’s at the point where, without reading glasses, she can’t read anything but the great big print on labels on stuff on store shelves. So I want to get her a phone that’s dead simple to use and that is designed for easy reading even for someone with hyperopia (farsightedness).

I’d appreciate any suggestions you Jellies might have on the brand and model to target.