Smartphone’s are still protected by traditional authentication mechanisms such as PINs and passwords, whose limitations and drawbacks are well known and well documented in the security community. Recently we are using physical biometrics like facial, finger print and iris recognition, in Smartphone authentication has mitigated the problems with user input, however, they still suffer from other usability and security issues. That’s why new, accurate, and user-friendly authentication mechanisms are required. In this direction, behavior-based Authentication solutions have recently come in handy to solve such issues. Now a day’s number of the Smartphone users prefer convenience over security and consider authentication mechanism more inconvenient as compared to other technological problems, such as lack of coverage, power consumption, etc. here we discuss limitations of existing authentication methods in terms of security and usability, and propose their replacements with behavioral biometric authentication mechanisms. We developed, prototype and test the proposed authentication mechanisms based on our identified human behavior, such as how a person speak on the phone, draw the line between two points, draw pattern on the phone, select portion on the image etc.