Have you ever found yourself in a situation where you need to hide your mobile from someone else? Well, have you ever tried using a voice-based lock screen? If you have, then you already know how frustrating it can be. You can try using a pattern, a pin, or even a password, but none of these options are very secure. 

Why don't you just use the voice-based lock screen? It is very simple and intuitive to use. You just need to speak a password and the app will recognize your voice and save it. Then, when you want to unlock your device, you need to speak the same password. If you are using the Android operating system, you will need to download the Google Voice password app.