How to find what OS version your BlackBerry is currently running.
   
  Go to the Home screen. Depending on the BlackBerry model, choose either Tools, Options, or Settings. From there, navigate to the About screen. It will read, "BlackBerry XXXX Wireless Handheld vX.X.X.XXX".
   
  The number after the 'Wireless Handheld" is your OS version number.