Nokia Beta Labs has just introduced its latest experimental app known as Nokia Bubbles, where it will actually change the locking screen of your new Symbian phone into a totally different beast, providing you with a flexible method of navigating your phone in a fun, interactive way. After installation, Nokia Bubbles might seem as though it isn’t doing anything – not at least until you lock the screen. Following that, pressing the usual unlock button to activate your phone does not work any more, as you are required to press the menu key instead. This key will let you interact with the phone and some of the menus inside without unlocking the phone – sounds confusing? You might want to try it for yourself and see whether this will persuade you to remain on the Symbian boat or not…