Samsung SM-A226BR/DSN User Manual page 24

Basics
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 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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