BlackBerry OS 5.0.0.463 hasn’t been officially released for the BlackBerry Curve 8530, however, that doesn’t mean that you can’t get it.

Download OS 5.0.0.463 for the BlackBerry Curve 8530

[Via BBLeaks]

Disclaimer: This leaked BlackBerry OS is not supported by your carrier or Research in Motion.  Install at your own Risk, and, for goodness sake, back up your device.