Device Authentication failed

[carbs1]

Hi All,

Fit Bit versa appears with "Unlock with your phone" have tried this now get an error

"Device Authentication failed" have tried logging out of the App and logging back in with no change.

My Fitbit is only a few months old and this is the first issue i have come across.

Appreciate any assistance you can offer.

Also is there a number that i can contact for tech support?

Thanks again

[LiliyaFitbit]

Welcome to the Fitbit Community, @carbs1. I am sorry for the delayed response.

I appreciate your participation in the Forums and sharing the issue you're experiencing with your Fitbit Versa showing "Device Authentication failed" error after you tried to unlock it with your phone. Thank you for your efforts to resolve this. I recommend doing a factory reset. Please note that you'll need to reinstall any apps on your device after the reset, and if you couldn’t sync your device, then any data on the Fitbit device will be lost. In order to do the factory reset, please do the following:

1. On the watch, hold all three buttons for about 10 to 12 seconds.
2. When the Fitbit logo disappears, quickly release the bottom right button, continuing to hold down the left and top right buttons (releasing the bottom right button as soon as the logo disappears is time sensitive). 
3. When the device vibrates, release all buttons. 
4. Wait for approximately 1-2 minutes while the device clears all data. Eventually, the Fitbit logo appears and the device boots and displays Fitbit.com/setup.
5. Once the Fitbit.com/setup screen appears, open the Bluetooth settings on your phone and unpair the watch from the list. Then, please set up the watch back to your account with the instructions on this link: How do I set up my Fitbit device? 

You can check the options to contact our Support team here. 

I'll be around if you need further assistance. 

[Jmum · Accepted solution]

All I did was set a password on my iPhone, return to the Fitbit app, go to decide unlock and it works from there! “Authentication failed” Apparently solved that way. Try it!

[LiliyaFitbit]

Welcome to the Fitbit Community, @Jmum.

Thank you for joining the thread and sharing your solution to the issue with the "Device Authentication failed" error. I appreciate your time and efforts to help other users. I am sure this information will be helpful. 

In case you have some spare time, I would like to invite you to visit our Discussions board where you can share your experiences, make new friends and create new topics.

Keep on visiting the forums!

[Cruiserkay1234]

Yes! This worked for me! I almost had to reset my Fitbit, but wanted to try this, and it worked! Thank you! I would have never of came up of this.