Select 'Add Fingerprint' in 'Settings> Fingerprints & Security> Fingerprints.' You can register the fingerprint by placing your finger on the power button.
To add fingerprint
1. Select 'Fingerprints' in 'Settings> Fingerprints & Security.'
2. You must set the security lock first if screen lock is not set.
3. Lift and place your finger repeatedly on the power button according to the instructions to register the fingerprint.
• Register a whole fingerprint several times. The phone can recognize a fingerprint faster and more accurately if the whole fingerprint is registered.
• Make sure that the power button is not covered by a protective film or protective case.