2-Check The Level Of Permission Given To Each App
Whenever a new app is installed, it asks for permission to access certain aspects of your phone. This could range from your contact list, email address to other details.
Always double check the permission asked by an app. If there are some access user are not sure about, they must refrain from using those apps.
1- Lock Important Apps
The apps which have access to vital details such as bank details, personal details must be locked using a pass-code. This is an additional verification which ensures the personal details are well protected.