Can't unlock my Sense with my phone

[Angelrmr]

Hello,
I’m having trouble resetting and unlocking my Fitbit Versa 4. The watch shows the message “Unlock with your phone,” but even with my phone nearby and the Fitbit app open, I’m unable to unlock it.
I tried performing a factory reset, but I get the message “Data not cleared. Sync & try again,” which prevents the reset from completing.
I’ve already removed the device from the app, unpaired it from Bluetooth, and restarted both the watch and the phone, but nothing worked.
I need help to restore the device or remove the lock.
Looking forward to your guidance. Thank you!

Moderator Edit: Clarified subject

[MarreFitbit]

Hi there, @Angelrmr. Welcome to the Fitbit Community Forums. Thanks for bringing this to my attention and for the troubleshooting steps you've tried. I'm sorry to hear that your Fitbit device is still locked. I will do my best to help you with this!

Since your Fitbit device was unpaired from your mobile phone, the only way to get rid of the message you're now receiving is in fact by performing a factory reset. However, since you mentioned you already tried this, I'd like to confirm that you did it the right way. Important: Take into consideration that a factory reset deletes any stored data, which includes all data that hasn't synced to your Fitbit account, your applications, alarms, etc. 

With that being said, I'd like you to please confirm if you performed it as described below:

1. Hold the back button for about 8 seconds. 
2. When the Fitbit logo disappears:
   1. Release the button briefly (for less than 2 seconds). 
   2. Hold the button again until you feel a second, longer vibration, which indicates you initiated the factory reset. 
      
      

At this point you can set up the Sense again. For instructions, see How do I set up my Fitbit device?