We haven't seen a leak for the 9520 in quite some time and it only seems right that one would show up eventually with all the news of the other devices getting official updates.  BBLeaks have now given to us all OS 5.0.0.428. 

As with any leaked OS, take care in installing it at your own risk. The BlackBerry Zone are not responsible if you choose to install and use this OS on your device.

• Download BlackBerry Storm2 9520 OS 5.0.0.428