I HAVE A BLUETOOTH HEADSET TO OPERATE PHONE HANDS FREE BUT ALTHOUGH IT IS RECOGNISED AND CONNECTS ON MY LENOVO A PLUS, I CAN NOT WORK OUT HOW TO SET UP VOICE DIALLING. HELP PLEASE.
Open the Google App > swipe from left to right > Settings > Voice > "Ok Google" detection > choose from any screen. With that settings, you can just say Ok Google anytime and your phone will listen to your command.