Tried to fix the SIM/phone issue with a hot air gun @190-225 degrees. Directing the airflow with a nozzle to the SIM card area. Tried it a couple of times increasing the temperature and time. No change in behaviour whatsoever. So I tried the oven method. In a fan oven @190 degrees for 5 minutes. After the 5 minutes I did not open the oven door, just let it cool down closed. After assembling the phone I tried to boot it, but it fails to boot now. Hangs in Nokia screen and tries to reboot several times until it gives up..
Nokia doesn't appear in lusb and no luck in trying to flash it (waiting for device). So I think I fried this one.
I have another N900 with the phone issue, will try to do the same but then open the oven door after 5 minutes.