Before updating you need to check the current software version on your Black Berry.
Check your software version by opening the menu from your Black Berry's home screen, then selecting options, then About.
The latest software version is shown at the top of this page.
If your version number is lower than this version this means a software update is available.
To start a new operating system install, you'll need your Black Berry, an Internet-connected PC, a USB cable and about an hour and half of free time—50 minutes or an hour for the upgrade process and 30 minutes or catch-up time afterwards.