If you are a BlackBerry Curve 3G 9300, Pearl 3G or Bold 9700 owner, there was a good news that an unofficial BlackBerry OS 188.8.131.524 had been leaked for those three BlackBerry models. This version reportedly comes with a new version of BlackBerry Messenger (BBM) updated to version 184.108.40.206. You can test and see the new experience of using BlackBerry OS 6.
WARNING!! Note that this version is NOT an official release and as such is not supported by RIM or your Carrier. If you choose to install, do it at your own risk.
You can download and test the OS 220.127.116.114 version from the links below:
BlackBerry OS 18.104.22.1684 for Curve 3G 9300