You are saying it shows no elevation gains? Try restarting it several times and see if it works then. If it doesnt try a factory reset (settings app on the watch and scroll down to About). If that doesnt fix it you will need to contact Support (link in my signature)
Helen | Western Australia
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Maybe try cleaning the hole located on left side underneath the bottom band. I had an issue with mine earlier this summer where it was counting 200+ floors per day when I was actually nowhere near that amount. Maybe it was just luck (perhaps it was atmospheric conditions too) but after cleaning that little hole out, things went back to normal.
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