Improving Android's Device Security using Behavioral Bio-metrics : LAP Lambert Academic Publishing : 9786202555951 : 6202555955 : 18 May 2020 : Mobile phone technology dominantly controls our daily life whether for solemn business matter or for our social life through which we access the whole universe just in a tap away. Thus, the power of connectivity using the Internet through GSM (Global System for Mobile)/LTE (Latest Technology Extended) enhanced its usage in a way not having one can be considered as handicapped. Losing our device, leaving the device unattended and exposure of our password/pattern can make us not only lose our reputation in our social network presence but also might be a risk allowing others to have control over our activities by the features we use through applications in our phones.The problem here is that this screen-lock authentication feature is breakable and the device can be unlocked easily.Our application will manage to work on behavioral authentication by