Recently, the slide to unlock and pattern lock have stopped working on my D2. I have them enabled and have the lock to set when the screen turns off. When I hit the power button, it shows the home page without any unlock screen.
I tried downloading 'screen off and lock' from the app store, it goes through the motions of turning the screen off, then pops right back on.
The pattern lock and slide lock will only appear if the phone has been sitting idle for 10-15 minutes, sometimes it never turns on.