How do I upgrade the OS on my BlackBerry?

How do I upgrade the OS on my device? Follow these instructions:

1. Download and install to PC the latest version of Desktop Manager from here: ( BlackBerry Operating System Downloads )

2. Download the new OS you want and install it to the PC

3. Open Desktop Manager and do a complete backup of your current device.

4. Delete the vendor.xml file located in c:\program files\common files\research in motion\apploader

5. Plug in BB and open Desktop Manager

6. Select Application Loader

7. You will be prompted to upgrade

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