This is the most common reason. Installing a new display panel changes the optical stack, requiring recalibration.
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) samsung fingerprint calibration tool
Samsung does not release this tool to the public. Authorized service centers access it via or the Samsung Service Tool Suite , which requires hardware authentication and an active service agreement. This is the most common reason
: Sometimes a software glitch or a new, thick screen protector can confuse the sensor, requiring a "reset" or calibration to restore accuracy. The Fix Fingerprint Scanner After Screen Replacement samsung fingerprint calibration tool
