My wife just got her S5 and right from the get go she started noticing issues. She then restarted it and it worked fine for a small length of time. From what I can gather it has a yellow screen and when you try and do anything it kicks it back to a black screen.So essentially you can't do anything with it. I've played around with lot's of phones but never had something quite like this on a brand new phone that just arrived.
Here are a couple pictures that she sent me. If any of you can give any insight it's greatly appreciated. I've been scowering the web as I'm a work right now and I can't turn up anything.