01-21-2016 14:49
01-21-2016 14:49
01-22-2016 04:50
01-22-2016 04:50
Welcome to the Forums @Blod21! I recommend starting by checking out these syncing troubleshoots. Make sure that there isn't another Bluetooth device that may be creating interference during the process. Setting up your tracker as a new device may also help you to bring it back to sync as usual. Also, make sure that your tracker is running the latest software version and your mobile device the latest version of the Fitbit app for iOs or Android device.
Hope this helps. Let me know the outcome.