Just thought I would let you know that I am running my ODAC out of my HTC One playing FLAC files and everything appears pretty sweet. I'm using Poweramp and some PSB M4U2s. 4.3 is installed on this device as well, it's all just stock.
In fact it's a bit too sweet, I am genuinely gobsmacked at the sound quality coming out of this set up. If ten years ago someone had told me you could get portable(ish) sound of this quality.... out of a phone.... I would have laughed in their face.
I just set this up to see what it would sound like and if everything worked properly so I don't have an all in one cable or anything, so there's wires everywhere but after this listening test I am considering going down that road.
I think we're pretty lucky to be living in this day and age :). I seem to find myself thinking that every day lately.