Can anyone help or confirm whether what I want makes sense? My iPhone is connected into my business email run by Exchange Server. As such this automatically removes the 'never' timeout with the result that I have to rekey my 4 digit password every 4/5 minutes. On dry land this is not a problem and I can live with it. However it is a problem in the car. Is it possible to activate Siri in such a way that I could speak my four digit passcode? This would mean that i'd either have to only depress the button on my bluetooth or press the home button on my phone and Siri could get me going? Any other useful hints would be welcomed.