BlackBerry Curve 8530 OS 

Curve 8530 users get another official update, this time courtesy of Sprint. OS is now available for download. The builds just keep getting bigger on these OS 5 releases and it seems like there is an endless supply. Some reports are in the forums on this one so far, so if you install be sure to visit the thread or leave a comment with your findings. As always, use caution when installing any OS.

Download OS from Sprint