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If you have tried all the above and still face "Authentication Failure," the hardware may be failing. Contact support if:

: If you are locked out of the device settings themselves, specialized tools like the ZKTeco Password Reset Tool zkteco authentication failure solution best

For users with worn fingerprints (e.g., manual laborers), assign a PIN code or an RFID proximity card alongside their biometric profile. If you have tried all the above and