A phone or tablet problem starting right after an OS update, a new case/accessory or a restored backup should be checked against that change first. For Galaxy fingerprint sensor, first clean/dry the surface, remove an incompatible protector for a test and enroll varied angles.
What this covers
- Galaxy fingerprint sensor with this exact failure state
- Diagnosis across finger condition and protector versus enrollment, display setting and sensor hardware
What it does not cover
Try in this order
0 of 4 completedCapture the exact failure state
ReversibleNote the exact update version, accessory or backup date, and confirm the feature worked immediately before it. Expected behavior: recognize enrolled fingers through the supported screen or sensor surface.
Isolate the component boundary
ReversibleClean/dry the surface, remove an incompatible protector for a test and enroll varied angles. Test with the new accessory removed, or check the update's known-issues note for the exact symptom. Boundary to separate: finger condition and protector versus enrollment, display setting and sensor hardware.
Correct only the proven cause
ReversibleUpdate, re-enroll or service the sensor/display after replacement. Reset the one setting the update changed, or replace the incompatible accessory.
Verify and stop safely
ReversibleConfirm normal operation with the change present for one full day of typical use. Keep a working PIN and stop for cracked/swollen display or liquid damage.
Evidence ledger
Sources behind this answer
Exact questions