We got the 9520 OS leak a few weeks ago but it looks like the BlackBerry Storm 2 9550 took its turn in getting a leak as well.  Here is OS 5.0.0.287 exclusively for the 9550 Storm 2.  Install at your own risk, and download while you can as this is a leaked version so links can go dead at any time.

• Click here to download OS 5.0.0.287 for the BlackBerry Storm 2 9550

-by Mac Jadalhack

Source: The IExplorers

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