Can anyone shed some light on whether you can use Voice Commands for calling while the screen is locked (via PIN Lock), for example while driving. I'm forced to use a PIN Lock. With Siri, I can still use the Home button to tell an iPhone to make a call and it will, regardless of Lock status. This is very convenient for driving. Can the same be done with Android? It seems it cannot as I would have to turn the phone on, unlock the device by inputting my PIN and only then would I be able to use Voice Commands.