To obtain the latest operating system for your Black Berry device, first check your wireless carrier's website.
This is the best way to get official RIM OS software.
The software version will be listed on the General tab.
Black Berry Desktop Manager version 4.5 If you're not running Desktop Manager v4.5, visit RIM's site and download and install the latest version of the software.
Your carrier may ask you to login to download the software, so you might need to create an online account if you haven't already done so.