BBSAK (BlackBerry Swiss Army Knife) is a practical toolkit for the users that want to back up their applications or to perform other maintenance operations. Just as the name suggests, it is designed to be an all-in-one tool for every BlackBerry user.
The application detects the compatible devices when it is started and allows you to enter the password required for accessing it. Since BBSAK cannot access the device at the same time as the BlackBerry Desktop Software, you need to close it manually or by pressing the Kill Processes button.
The most used functions of the program such as the backup and restore features are available in the main window. These enable you to create a backup of certain applications, even the ones installed from other sources than the App World store.
You can use BBSAK to load a new operating system on your device and to keep multiple OS versions on your computer. Instead of removing the old version, installing the new one and updating the software of the phone, you can simply select the OS that you want to use. This function can be used both for upgrading and downgrading the phone.
Some of the available features can damage your device if not used properly. For instance, you can delete all the content of your phone, including the operating system by using the Wipe Device button. While this is useful for cleaning the device after an unsuccessful update, it can also cause data loss if you do not know what you are doing.
The program can also handle the COD files that are used by the phone to install and run the applications. These can be copied to and from the computer folders if you need to manually change the phone content. If you want to learn a thing or two about this operation, you can take a look at the documentation from this page.
Overall, BBSAK includes a useful set of tools for managing your phone content. It is not designed to replace the BlackBerry Desktop Software but to complete its features for tweaking your mobile device.