Constant SYNC FAIL

Garmin Connect Mobile problem. Have you logged this on the GCM forum? Have you logged a fault with Garmin Support?

Same issue.  I need to close GCMobile, then restart it to get a sync.  Once I even had to turn off bluetooth then back on.

I was able to resolve this; at least for the last few hours... What I did was removing the Garmin CIQ app altogether, then removing and reinstalling Garmin Connect Mobile.

Since then the sync is working again. This is on a iPhone 11 Pro Max with IOS 13.2 Beta.

Might be worth giving it a try.

Already did this and still getting Failed toast on my MARQ watch

Same here.  Friend of mine with a Fenix 5s plus reporting same problems.  Sounds like recent updates broke something..  I do get it eventually to work but it takes a few random phone and watch restarts.

Same here.

both when opening GCM (have to force-close it, disable bluetooth, reenable it, open GCM; that usually works), and also frquent “sync failed” messages on the watch

Same Problem here since last week. The sync is not completed, records are gone and weather widget on watch doesn’t work. iPhone Xmax 13.2. Marq Expedition.  
*on the other hand - I do get an annoying massage that reminds  me that I’m on active call, while I’m on active call... go figure. 

I wish there was a way to control the auto update, or at least return to the older version which worked flawlessly 

I wish I understood why Garmin BT syncing is so delicate.  We seem to go through this at least once a year with regular monotony - meanwhile every other BT thing I've got that syncs with my phone just keeps working without a hiccup, over app and iOS updates.  What are Garmin doing so wrong/differently that syncing just seems to break all the time?  I means it's not as if it's anything important like the core function of the app is it?

I was able to fix the sync issue (which for me started today, weeks after iOS update and several days after 5.20 auto-update) by soft-resetting the watch. Trouble is: after that my calendar sync is broken. Neither structured workouts from Garmin, nor Training Peaks workout sync.

Tried to sync via Express: no luck there. The sync runs through completion, the calendar on the watch is still empty.

(Logged issue with Garmin support. They do suspect something in GC Mobile/data service, but no exact cause, nor solution.)

• I am having the same issue. All history data are not showing in the app. I have reinstalled the app in the phone, I have restarted the watch as recommended but no result. I am starting to be hopeless.