TechnoidFR
500+ Head-Fier
I know many have talked about the connection issue, for now I haven't had any issues with it. However if I was to grab it with my fingers while it is in my ear the audio does cut out.
To have good connection with smartphone. You need to have S730/S845/S855 which have true wireless stereo plus Qualcomm feature. The both are connected to the smartphone.
With the classic master/slave the performance are mediocre