OS 5.0.0.1036
Vodafone DE has made OS 5.0.0.1036 official for the BlackBerry Curve 8900. This is the same version that was leaked last month. If you have not upgraded yet to .1036 you can grab it at the link below. Remember, if your not a Vodafone DE customer then you will want to delete the vendor.xml file before installing this on your device.
It is always recommended that you backup your phones data with the BlackBerry Desktop Software before installing a new operating system.
Source: crackberry