In this video you will see how to get BlackBerry device password. It can be done if BlackBerry smartphone is equipped with a media card which should be encrypted using "device password" feature. In that case you only need this media card, and particularly info.mkf file.
To get the password you simply start Elcomsoft Phone Password Breaker, search for the info.mkf file and run an attack against that very file.
The speed is high enough even without hardware acceleration, however you can use it if you have some graphic cards available.