Try syncing the watch with http://software.garmin.com/en-US/express.html. Upon completion, the activities you performed will be archived on the Fenix 2. Archived files are NOT sent to Garmin Connect Mobile for uploading to servers. So the next time you sync with the mobile device, there should only be a few activities to upload, which shouldn't take too long on a good internet connection (either mobile or wi-fi).
I tried the solution but when try to sync make the same thing... IIf i put off automatic he tell me that the sync is ok but don't add the new activity...
