Fenix 5/5s reboots itself

Recently I have purchased Fenix 5 and 5s (APAC version, FW 7.70), and been using them for about 2 weeks.
Now I'm facing a trouble, that they suddenly reboot itself while I'm training, and off course it stops tracking.
Such reboot occurs when using running app and yoga app. (I have not tried the other apps yet)

Is there anyone facing the similar issues?

I already tried hard reset but it didn't work.
Also I tried 5 and 5s, and found that the same trouble happened on both watches.

0 Former Member over 7 years ago

Same here. Try to put the phone in airplane mode while you are training; I believe it has to do with syncing and os 8. Let me know if that helps;

0 hitoshi over 7 years ago

Thanks FrankyL.

Yes, recently (and finally) I found the same solution.
When I go running leaving my iPhone at home, it works just fine. There must be an issue related with iPhone connection as you suggest.

0 hitoshi over 7 years ago

FYI, I'm using iPhone X with iOS 11.3 running.