I think you should ask some blind people, not Slashdot people.
A friend is blind, and could certainly afford anything, but I'm 90% sure he has an Android phone. It's certainly not an iPhone, it's possible it's a less-smart-phone.
So you're recommending him to ask blind people and you haven't even confirmed what your friend is using. I hope he doesn't listen to your guess at an anecdote.
So lets take your core advice - here is a review from an actual blind person (and linux geek) getting an iPhone. Excerpt:
Last Wednesday, my life changed forever. I got an iPhone. I consider it the greatest thing to happen to the blind for a very long time, possibly ever. It offers unparalleled access to properly made applications, and changed my life in twenty-four hours. The iPhone only has one thing holding it back: iTunes. Nevertheless, I have fallen in love.
Yes, this is from 2010, however, I haven't heard how Android has turned the tables. It would be interesting if someone could actually compare the two current versions of the major OSs for blind users. I only seem to see Apple-specific forums for the blind on the internets.