The phone is litterally a brick with a (almost) bezel-less screen. Outstanding job, designers.
Then Starck is the one who designed the Mi Mix 2 to have no headphone jack and lesser mAh than the original. Phones like this should've been thicker in order to accomodate more space for the battery and the jack but since premium = thin form factor, I think it's remotely impossible.
I'm okay with Bluetooth headsets but there isn't a headset worthy to sound exactly like the wired ones because of the usual wireless woes.