If you want to check the status of your sensor or attempt a local test, Samsung devices have a built-in diagnostic menu. Note: This menu allows you to test the sensor, but full recalibration after a screen swap often still requires the external software mentioned above. Open the app. Dial *#0*# to open the hardware diagnostic menu. Tap on Sensor . Scroll down to the FingerPrint Test section.
If you see this specific error, standard registration often won't work until the underlying software/hardware mismatch is cleared. samsung fingerprint calibration tool
You often need a calibration rubber/mold (a specialized physical tool) to place on the screen during the software test. 2. Service Menu (Code Dialing) If you want to check the status of
Connect your phone via USB to run the "Optical Fingerprint Calibration" routine. 💡 Pro Tip: Update Your Firmware First Dial *#0*# to open the hardware diagnostic menu
Calibration often "pairs" the new hardware to the motherboard to re-enable biometric security features. 📲 How to Access It
Unlike optical sensors that take a 2D picture of your finger, ultrasonic sensors use sound waves to map the ridges, pores, and even sweat glands of your fingertip. This requires an incredibly precise physical alignment with the display.