so many N9s faced same issue - suddenly faced SIM error without any real reason. Unable to flash cmt.
Similar issues I have read about N900.

Can any expert from Nokia MeeGo team can help here? Any way to fully fix this? downgrade again?
There must be some way.

If someone can come up with idea, it will help many users here. I am ready to donate/pay some $ for getting my N9 fixed.