Need to be calibrated to ensure light levels and image capture are accurate.
The "Samsung fingerprint calibration tool" is a utility used to synchronize the optical fingerprint sensor with the display samsung fingerprint calibration tool
Further reading
How to Test Fingerprint Recognition on Samsung Galaxy S25 Ultra Need to be calibrated to ensure light levels
Samsung uses Ultrasonic sensors on flagship models. These are very sensitive to interference between your thumb and the sensor. samsung fingerprint calibration tool
The Samsung fingerprint calibration tool is a specialized software program used by technicians to sync a new display with the existing or newly installed optical or ultrasonic fingerprint sensor.