[Galaxy J5/J7 2017] How do I register fingerprints?

On the Settings screen, tap Lock screen and security.

To use your Fingerprint  to unlock your device, you must set a pattern or PIN or password.

Unlock the screen using the preset screen lock method. If you have not set a screen lock method, create one.

Place your finger on the Home key.

After the device detects your finger, lift it up and place it on the Home key again.

Repeat this action until the fingerprint is registered. For the best results, move your finger upwards or downwards slightly between attempts. When you are finished registering your fingerprints, tap DONE.

When a fingerprint lock pop-up window appears, tap TURN ON to use your fingerprint to unlock the screen.

Now, you can use fingerprint to lock and unlock the screen. On the locked screen, place your finger on the Home key and scan your fingerprint.

Alternatively, you can unlock the screen using the preset screen lock method.