HOW TO UPGRADE BLACKBERRY OS WITH PC FOR FREE

BlackBerry OS Upgrade requirements:
  1. Install the most recent version of BlackBerry Desktop Manager Software. (Download)
  2. Use the Desktop Manager to Backup all You data
  3. Download And Install the Blackberry handheld Software (100 - 200MB) for Your Mobile Operator / Region. Not all devices can be upgraded to 7.0 yet. 
The Popular ones are: Verizon Wireless, AT&T, Sprint Spectrum L.P.
NOTE: Enter the correct BlackBerry Device Model in the Operator Page to avoid downloading the Wrong OS.

  4. Navigate to this Folder C:\Program Files\Common Files\Research In Motion\AppLoader and Rename            thevendor.xml file to _vendor.xml 

5. You can Now Connect Your Blackberry Device to the Computer. 
     Find and Run the Apploader.exe file, located in the same folder as vendor.xml and Follow the Install Wizard      instructions to Back Up your apps and other data Before the Installation.

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