I have the 3.1 plus and if get calls with headphones plugged in and when I click the button on the headphones or the phone to pick up the audio doesn't pick up. The caller can hear me but the audio does not play for me. I have to unplug and plug back in. Even then it sometimes doesn't connect.
Also I have a Samsung gear sport 3 and it constantly drops connection to the watch. Only to connect shortly after.
I like this phone but it has sevrsev annoying glitches. These being two that seriously make me regret this purchase. Seems like a simple update could fix it though so I'm hoping this can be resolved.