Somehow I have managed to lock all the applications on my phone and I can't figure out how to undo it. Every time I click an app and hold to add/move/delete I just get a message across the top of my screen that says Screen Locked with a little symbol of a closed lock. I can still use and access the apps but I cannot add/delete/move them. I've been hunting everywhere I can think of to undo this but I can't find a setting for it. Any help would be greatly appreciated.