In these days, Android has become a very popular operating system for smart phones. There are some advanced features in android Smartphone, with which user can easily share applications via online market store i.e. Google market store. But, there are attacks and threats include in this platform, like malware applications are also attack on Android actual applications. Because malware on device can create number of risks, which creates problem while connectivity because of security issues. In this paper, it will be described that how security can be improve of Android Operating System so that users can safely used the android Smart phones.