How to protect your BlackBerry smartphone from malware

In order to help protect yourself from these types of security concerns, you should avoid downloading and installing applications from untrusted sources. This simple precaution helps mitigate the risk of malware being installed on your device because you don’t permit it to.

To further help protect customers, BlackBerry smartphones are designed to require user interaction and decision making to prevent malware from silently gaining access to devices. For example, when an application attempts to install itself on a BlackBerry smartphone, the device always asks the user if they want to download the application. In addition, if the user or a BlackBerry Enterprise Server administrator has configured the BlackBerry smartphone to require a device password when installing an application, the user will be prompted for their device password, before downloading and installing the application.

Source: inside BlackBerry blog