After I upgraded my system on my Meizu MX5, I see no option in Google App to turn on Ok Google detection from outside the app (
Settings > Voice > "Ok Google" detection > and here I have only
From the Google app).
In Google support website I see that "For certain devices, you can also change some settings to turn on "Ok Google" detection outside the Google app".
So what are these "certain devices"? I have Android version 5.1. Why can't I use Ok Google from outside the app although I could use it before updating my system?
I opened an issue here: OK Google options missing