What an amazing device...
first ride, a bit of fiddling (checking options etc.) and ...
https://www.youtube.com/watch?v=7ssLwKee314
nothing worked, but happily, after 10 minutes of rebooting, it stopped
and i was able to continue the ride..... and later, closer to the end, i saw that my total descent is not accumulating.... it happened that you have to start activity AGAIN !! so half of my ride was not recorded !!! so there is something wrong !! Why i can see all stats (like my elevation etc.), but there is no symbol/icon indicating that my recording is stopped/paused !!
not impressed at all, i was hesitating a lot, if i need that kind of gadget (for mtb and exploring - instead of using my phone all the time),
but it happened that cheapest phone, like for 100eur, can give you much more options....