There is a new feature in android that asked you "just once" or always when you preform certain actions. I'm told you can undo this by going in to the app manager and pressing clear defaults. In my case I dont know the app? I installed a new dialer and when the call is hung up it asks that question in relation to where the phone navigates next. Well I told it to navigate to the default phone dialer. I want to undo that but what app is the main phone dialer? I tried to run it and check for running apps but nothing new showed up. So I guess its not really an app? Any idea how to undo this?