Samsung Galaxy M31 128GB User Manual page 23

Basics
• Covering the fingerprint recognition sensor with protective films, stickers, or other
accessories may decrease the fingerprint recognition rate. If the fingerprint recognition
sensor is initially covered with a protective film, remove it before using the fingerprint
recognition sensor.
• Ensure that the fingerprint recognition sensor and your fingers are clean and dry.
• If you bend your finger or use a fingertip, the device may not recognize your fingerprints.
Make sure to cover the entire fingerprint recognition sensor with your finger.
• In dry environments, static electricity can build up in the device. Avoid using this feature
in dry environments or before using the feature, discharge static electricity by touching a
metal object.
Registering fingerprints
Launch the Settings app and tap Biometrics and security → Fingerprints.
1
Read the on-screen instructions and tap Continue.
2
Set a screen lock method.
3
Place your finger on the fingerprint recognition sensor. After the device detects your
4
finger, lift it up and place it on the fingerprint recognition sensor again.
Repeat this action until the fingerprint is registered.
When you are finished registering your fingerprints, tap Done.
5
You can check whether your fingerprint is registered by tapping Check added
fingerprints.
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