it's always nice to have a headphone jack but BT is the way to go, on-the-go
if you cared about SQ you probably wouldn't even use a mobile phone without portable dac
the high-res audio in my sony is good enough for me esp since i only use cheap IEM when traveling
High-resolution audio: everything you need to know | What Hi-Fi?
OT, looking forward to next year's iphone when they come out with a premium model with OLED...about damn time! pair it with superb battery life and I'll ditch android...getting bored of it.