XDA Forum Member AcerExtensa has posted a guide that for users with the German or unbranded versions of the device to obtain the official ICS OTA. What’s more, the OTA has been modified so that users don’t have to upgrade their HBoot, recovery, or radio before updating.
The process is in 3 stages. First, users download the OTA in the form of a flashable update.zip. It is noted that users should use the 4EXT recovery, as that is the only recovery tested so far. Afterwards, users are to download a PG86IMG.zip to flash in the bootloader. This gives users unrooted ICS without losing any of the fun stuff. The last step is flashing root to the device.
It won’t be long until many derivative ROMs are updated with the fresh base, and many options based on this build appear. Here’s hoping the CDMA EVO 3D gets similar treatment soon.