How to unlock screen using Bixby Voice?
You can unlock the screen by saying your voice password to Bixby voice.
• Your device can be unlocked by someone else who says the correct password.
• Voice password is less secure that Pattern, PIN, or Password.
If you speak to Bixby Voice while the screen is locked, Bixby Voice will ask you to say your voice password. Say your voice password to unlock the screen.