A problem starting right after a firmware update, a new host pairing or a software install should be checked against that specific change before a full reset. For Fitbit data synchronization, first charge both, restart and sync with other Bluetooth hosts disconnected.
What this covers
- Fitbit data synchronization with this exact failure state
- Diagnosis across tracker versus Bluetooth ownership, app permission, account and service
What it does not cover
Try in this order
0 of 4 completedCapture the exact failure state
ReversibleNote the exact firmware version or newly paired host, and confirm the prior working state. Expected behavior: transfer current activity and settings to the correct account without erasing unsynced data.
Isolate the component boundary
ReversibleCharge both, restart and sync with other Bluetooth hosts disconnected. Test with the new pairing removed, or check for a known-issue note for the firmware version. Boundary to separate: tracker versus Bluetooth ownership, app permission, account and service.
Correct only the proven cause
ReversibleCorrect permissions/pairing or contact support before reset. Apply the vendor's fix for the update, or remove the conflicting extra pairing.
Verify and stop safely
ReversibleConfirm normal operation with the change present across at least one full session. Preserve unsynced health data and never share account credentials.
Evidence ledger
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