Here's a phone that can help the vision-impaired.
OwnFone has released what it says is the world's first Braille phone. It's constructed with 3-D printing.
It's also available with raised text for those who can't read Braille. The phone is only available in the U.K. for now for around $100.
OwnFone has released a child-friendly phone, too, as well as phones for older folks who might need a little help with the buttons.
These aren't smartphones, but simple feature phones for simple tasks.
It's amazing what we can do with 3-D printing. Take a look at other uses for 3-D printing.