Smart Voice Screen Lock is an amazing application that will help you to use your voice to unlock your device. With it, you can set up a voice password and use it to unlock your phone. It's so easy to use, and it works on all Android devices.

The first thing you need to do is to download this application and install it. After installation, you need to create a voice password and configure it.

The voice password is used to unlock the device, so you need to make sure that nobody is listening to you. The best way to do that is to use a microphone and make sure that nobody is talking to you.

Once you're done with the configuration, you can use the app to lock and unlock your device. It works with the lock screen, and you can also set an alternative pin code.