I've already taken 6 iPhone 5's back to Apple. All of them with yellow tint! It's the end of the iPhone! DOOM!
It's ok, I complained so much that they gave me a free iPhone upgrade for life. Yup, because I complained and moaned so much I told them I was entitled to free iPhones for life, every year! And I'll get the new one a week before everyone else! Because I'm entitled to it!
Mine not only has a yellow tint, but it has turned my hand yellow. I washed it, but when I shook my colleague's hand, his hand also turned yellow. Over the course of the afternoon, our entire building, and in turn the entire town, as turned the same odd shade of mustard as seen on this infernal iPhone 5.
think there going to hold off until iphone 9 comes out to resolve that issue.. there beta fix in iphone 8 but don't think see totally resolved until 9. But who knows dates could slip and end up in 10.