I've followed every troubleshooting step on the support site. Fitbit support told me on the phone that they can't help me but I could buy a new Fitbit device.
i think they updated the app in a way that intentionally forces users of older Fitbits to purchase new ones.
Thoughts anyone?
Solved: Log out of your fitbit account then turn off your Bluetooth next put your fitbit in the charger and hold the button down for exactly 15 seconds. After 15 seconds take fitbit off the charger (your fitbit should not come on). Turn on fitbit and then turn on Bluetooth sign in to your fitbit account your fitbit should start syncing. This worked for my fitbit.
Thank you so much for this info! It has been driving me nuts since Wednesday that my Fitbit wasn't syncing!
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