last Night when I was just laying down watching TV, my galaxy watch 42mm read my heart rate to be 220 bpm. 10 minutes later it was 90bpm. I really freaked out and went to the hospital to measure my heart rate again , in the hospital the heart rate was normal, 80 bpm. I was relieved but still concerned about the 220 bpm. So I kept measuring the heart rate for about 2 hours and it was normal! A week earlier the watch read my heart rate heart rate to be 186 while I was laying down doing nothing! Both incidents were reported from 10-11PM when I was laying down doing nothing!
Having the same problem as everyone else regarding the HR monitor. Still have 30 days to send it back to Amazon and get the Ticwatch... Did you GET IT Samsung, It's going back if you don't release a FIX.