Tweet Manual device OS upgrade instructions

First locate your carrier and the OS
file you wish to use.
http://na.blackberry.com/eng/
support/downloads/
download_sites.jsp
Do a backup of your device first, using
Desktop Manager > Backup. Close
Desktop Manager upon completion.
1. Download the OS file to the PC
then install it to the PC by running
(double clicking) the file you
downloaded.
2. Go to c:\program files\common files
\research in motion\apploader and
delete the file named "vendor.xml."
3. Plug in BB and double click on
"Loader.exe." It's located in the same
place as the above vendor.xml file