Make the phone always-listening to "OK Google" with fingerprint sensor on Nexus 5X I have a Nexus 5X running Android 6 Marshmallow, and I want "OK Google" trained to my voice to work when the device is on but the screen is off. I also use fingerprint scanner for "smart lock"/screen lock. When I say "OK Google", the device requests a fingerprint or PIN before it will do the action requested. This renders the feature pretty useless as it's mostly a hands-free tool. (Note: "OK Google" works perfectly with no screen lock activated.)

Given that OK Google is trained to my voice only and that it is a hands-free feature, I find it strange that I can't use it that way when using the fingerprint scanner or other screen lock feature. Is there a way to do it?

I'm happy to have no screen lock but just have the fingerprint scanner turn the screen on instead, if that's possible - I find it useful when taking the device out of my pocket.
Under Security and under Smart Lock, go to Trusted voice and check the option that says Always on. That's how I got "OK Google" to work when my phone is locked. I use the fingerprint lock as well.