How to installing os for your blackberry Device

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The BB 8520 CANNOT upgrage to OS6 so really there isn't any point in upgrading as you probably have the latest OS already unless your looking for a bug fix then stop wasting your time! This will work but wont get you OS6 on the 8520.
Download Links:
♦uk.blackberry.com/services/desktop/ - BB Device Manager
♦swdownloads.blackberry.com/Downloads/entry.do?c…... -- Blackberry OS
--If the above link does NOT work then click here bit.ly/ijOKa8 for some reason youtube adds a dash in the link which results in it not working--
♦bbsak.org/ - BBSAK
It will work but you will only update to the latest version your blackberry supports. The only versions that support BB OS6 are 9800, 9780, 9700, 9670, 9650, 9330, 9300 and 9100. If yours doesn't it may still be able to update to a newer version which may have bug fixes.
For those with PORT issues: forums.crackberry.com/blackberry-apps-f35/bbsak…...