Yet another official OS from Hutchison, this one is for the BlackBerry 8900. You can pick up the OS at this link. Remember to do a backup of your settings and 3rd party applications. You can use DM to do a settings backup and BBSAK or BBMCP to back up 3rd party apps.
If you do not know how to upgrade your BlackBerry OS please start by reading this great step by step guide. Don’t forget to delete the vendor.xml file located in c:program files>common files>research in motion>apploader to install it on a different carriers device.