Fingerprint sensor not working

[Arin049]

Fingerprint sensor calibration needed samsung a31 after changing the display. Hiw i solve this problem

[MADLELAPHEZULU]

Hi Arin049.
Kindly visit your nearest SAMSUNG SERVICE CENTER as this problem is almost impossible to fix.
Locate your nearest SERVICE CENTER here.
https://www.samsung.com/in/support/service-center/

[GalaxyA51user]

Restart phone or try to delete all fingerprints and register them again.

[tshepang13]

Is it expensive to fix