Samsung Galaxy Tab S4 User Manual page 186

Settings
5
Position your eyes inside the circles on the screen and open your eyes wide.
The iris recognition camera will scan your irises.
When an iris unlock screen appears, tap TURN ON to use your irises to unlock the screen.
Deleting registered iris data
You can delete iris data that you have registered.
1 On the Settings screen, tap Biometrics and security → Iris Scanner.
2
Unlock the screen using the preset screen lock method.
3
Tap Remove iris data.
Once the registered iris data has been deleted, all the related features will also be
deactivated.
Using Samsung Pass
When you register your irises to Samsung Pass, you can use them to easily verify your identity
or sign in to websites. Refer to Samsung Pass for more information.
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