12-23-2012 10:02 PM - edited 12-23-2012 10:04 PM
I don't think OS6 is available for the 8520 .
You can check here:
I found some more info here:
12-23-2012 10:22 PM - edited 12-23-2012 10:22 PM
BlackBerry 8520 doesn't have required hardware for running OS 6.0. Hence, it doesn't support OS 6.0.
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