I also have the same issue. Mine does not work on the Samsung Health App to record Heart Rate or Stress. Just another problem along with no sound on text or ringing with all notification set correctly. Doesn't make a sound if you change the sound settings either. Also, one does it plays video preview in Facebook the next it says there is a problem and won't work. So far nothing short of an awful experience. Sad when I was so excited about my new phone. Has put my friends off changing so far.
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