I installed Cyanogen 9 and it has been working like a charm, but where it goes into detail about RadioRCDATA and renaming PC10IMG.zips thye lost me. I did how ever try the 2.1VisionWifiCalling Addon.zip and EFS Partition Wipe Tool. The 2.1Wificallingaddon did seem to work (somewhat), nad the EFS Partition Wipe Tool completely failed to install while in cmw.
when I flash the 2.1WifiCallAddon I lose my network coverage but regain my wifi coverage. So if anyone out there knows of a file that is causing a conflict or even another ROM I could try with wifi calling I would be very pleased. thinking about Trying ubuntu,