I am pretty happy with OS 188.8.131.520 on my Torch but I have not heard many reports of it on the Bold 9650 yet. You can now try it out for yourself officially thanks to Sprint. Quite a few readers let us know that the download is now available and some are already seeing it through desktop manager.
Simply head on over to the Sprint download site @BlackBerry.com to pick it up
Warning: This OS will not install on any other BlackBerry besides the one mentioned above. Don’t forget to delete the vendor.xml file located in c:program files>common files>research in motion>apploader to install it on a different carriers device. If you do not know how to upgrade your BlackBerry OS please start by reading this step by step guide.