Huawei GT3 Guide De Démarrage Rapide page 8

Fingerprint identification
Fingerprint identification is the best way to keep your phone
secure.
You can use your fingerprint to unlock a file safe or app lock, take
photos, unlock your screen, answer calls and stop alarms. Using
your fingerprint makes it easier to keep your phone secure.
Touch Settings > Fingerprint ID > Fingerprint management
and follow the onscreen instructions to add your fingerprint.
When adding your fingerprint, make sure the fingerprint
sensor and your fingers are dry and clean.
4