> 1. Can I use the CAMERA BUTTON to turn the screen on if it is off?
Not in recent Android releases.
> 2. Can I use the CAMERA BUTTON to unlock the screen when the phone is
> in use and it says "Press the LOCK key to unlock"?
Possibly, if you have a rooted phone, which I guess you don't.
> 3. Can I use the CAMERA BUTTON to hang up the phone (when the screen
> is unlocked)? Maybe through a simulated screen touch?
Possibly. Try the event hardware / camera long press, connect it to
the Phone / End Call action.
Pent