Originally Posted by Hieronymous
Google Now voice activation works great. However, when the phone is locked I have to unlock the phone to get the results. Kind of defeats the purpose when I'm driving! When I first got the phone and drove in my car, it somehow noticed I was driving (I also had Navigation running) and it offered the option to keep my phone unlocked. Would be great if there was a quick-icon to let the phone know I'm driving and to keep my phone unlocked so I can use the OK Google Now fun.
Do you have Bluetooth in your car? If so you can set the car as a trusted Bluetooth device and keep the phone unlocked while you are in the car. Settings/security & screen lock/ trusted devices.
Also you can set Touchless controls to place calls while the phone is locked - so at least you can place calls.