I have galaxy watch SM-R815N it was working fine , day ago i see its not geting heart rate i try manually i get error Retry stay still while your watch tries to measure your heart rate again " green light sensor working but what ever i try i cant get hr i search internet and i did all steps clean , restart , format hard reset , noway
But when i put it to measure HR continuosly its working normal .
Parometer and Altimeter not working , Also sure there is no water go inside the watch .
any help please
no dear . Not solve yet . I think that samsung have manufactured bugs problem . And even a lot of people face same problem . But there is no solution only u must send it to maintenance center . and idk if they can fix it even this out of warranty