Hi paul,
Here is, for me anyway, the ideal behaviour: kill the lock (forcing the reg key to 0 is fine with me, I can live with random flickers of the lock message) only after I have pressed the Dpad key during a call (incoming or outgoing).
Here is my reasoning: I like to have the screen locked during a call to prevent unwanted screen touches (face, pulling out of the pouch, etc). What I am looking for is to be able to unlock it, and have it stay unlocked (or continuously unlocking it) for the rest of the call to allow me to listen to voicemail, navigate through auto-attendants,etc.
So I guess if you could start resetting the reg key when I press the Dpad key (or any other key if it is difficult to monitor)
during a call, and stop resetting at the end of the call (or at the start of the next call), I would be a very happy camper

.
Thanks, I appreciate your work on this.