I am sending this more as a reminder of a few good links I found lately. I managed to render the phone unusable with its SIM card last night. After a lot of testing and trialling, eventually found a firmware which works (JPC) which fixes my baseband radio issue. I can now make and receive calls again. Build seems to be a fairly recent one (few days old). I have also found a page about all the downloads you need which includes rooting stuff, radio files and more. I feel the need to include the thread which began my sleepless night. On the baseband front, this is what you want. I would advise by start reading this thread first.