I had my F90BT for almost a year now and it always worked well with my iphone 3g. Lately it doesn't always connect to my iPhone when I turn on the car, however, it stops connecting at all completely. I tried to delete the pair up the phone with the f90bt. The F90bt will not detect my phone. I know it is not my phone's fault as I was able to detect some "Land Rover" next to me and some "nuvi" down the road. Upon checking if I can update my bluetooth's version, it say "Not available" or "Not Found" and the "Software Update" part is grayed out. What can be wrong?

I recently experienced exactly the same symptoms. Have tried a reset, but no luck. Seems to me the bluetooth interface/board is cactus.