Do you ever give your unlocked phone to another person? Learn how in just 30 seconds they can add their own fingerprint, allowing them to unlock it whenever they get their hands on your phone again. This video will also teach you how to easily protect yourself against this attack. Please take caution if attempting this. The Activities accessible through Nova Launcher are not necessarily intended to be accessed by the end-user. I apologise for the poor audio quality - it has been improved for future videos.