In most of the cases Android Operating System(OS) is not secure because it is open source system, any one can make apps and attack on your phone.
There is no question the Android mobile operating system (OS) is a dominant force in the world of smartphones. But it is also most susceptible to malware, the least secure fresh out of the box and the most fragmented.
If you want to use OS on tablets or mobiles for business, security will have to be your number one priority. Follow these security tips and Android will become a much more secure and reliable mobile operating system.
These are the ways by using we can make more secure to Android devices.