Android users are rapidly increasing so is use of internet on mobile devices. This paper present settings, configuration, habits of internet usage made by user on android devices. Data collection has been done for understanding usability of android devices. The purpose of data collection was seeking information about security vulnerabilities created due to unawareness of android operating system and its settings. Analysis is done on the basis of responses from users for avoiding vulnerabilities due to unawareness of different settings exists in android devices.