My new phone is the first with bluetooth aptX HD, and my XB10 is the only device capable of receiving that. I didn't anticipate much difference compared to regular aptX .... but there sure was one! Well, not with all recordings of course, but the ones with a lot of acoustic zing sound even better, with so much more 'air'. Positively surprised. Yes, the XB10 still has tiny flimsy buttons, volume control increments are kinda huge, but sound is awesome.