Same issue, hitting sync goes quickly to complete. Garmin connect shows no data. Been happening since 2/9. Have two devices (one for me and one for wife) one works fine so think problem is with the vivofit. Wondering if I should pull battery and reset or take in to store for return?
From the newly posted sticky from Garmin Support:
"There is a known issue that exists for some customers using the vivofit. The vivofit will successfully sync to the Garmin Mobile application but no new step information appears. If you experience this please try the following as a temporary work around:
Press and hold the function key on the vivofit for about 12 seconds or until the screen on the watch goes blank. Now attempt to sync the watch to the device. This should now allow steps to successfully sync. A permanent fix will likely be included in a software update sometime in the near future.
We do apologize for any issues this may have caused you and appreciate your patience."