Samsung Fingerprint Calibration Tool

: Technicians use specific "calibration blocks"—often a white box and a black box—placed over the sensor area.

Tap on Sensor and look for Fingerprint Test or Normal Scan . samsung fingerprint calibration tool

If your fingerprint sensor stopped working after a screen repair, found on shady sites. Instead: How to Calibrate an Optical Fingerprint Sensor - iFixit samsung fingerprint calibration tool