Android is an operating system used to operate mobile phones that have been used by the world community. Android is a Linux-based operating system designed for touch screen mobile devices such as smart phones and tablet computers. Android was originally developed by Android, Inc., with financial support from Google, which then bought it in 2005. Firewall is a computer network security system used to protect a computer from some kind of attack from an external computer.
If these two definitions are combined it will form a new understanding of a android operating system security that protects android from malware attacks or harmful things.
So it can be sure to protect your android phone, you must install an application that can handle all sorts of malware or other external attacks. Many applications are Android Firewall but there is also a requirement for rooting the phone first.
