From day one if the lock screen was up all I had to do is slide to open. Now all of a sudden, it has a number pad and I need to apply my PIN. If I go to settings, system settings, security & screen lock, under screen lock it says PIN, but when I tap it, it ask to confirm PIN. It looks like my only other options are pattern or password. None, slide and face unlock have been greyed-out and "disabled by admin, encryption policy or credential storage". Not sure how any of those happened.