Samsung SM-A225M/N User Manual page 87

Settings
Registering fingerprints
On the Settings screen, 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 Side key. After the device detects your finger, lift it up and place it
4
on the Side key 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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