Updating the N950 firmware

I just got a N950 like probably some other KDE contributors will be getting this week. Thanks Nokia!

I am writing this blog to bring two things into your attention:
* The firmware shipped is not the last one, you might want to download the new one.
* Updating the firmware failed for me with a "USB interface: Device or resource busy" error

To fix this problem I needed to run
while true; do modprobe -r cdc_phonet; done
in a separate terminal and then it all worked (note it takes around 20 minutes to update, be patient) (kudos to google for showing me the answer in an obscure irc log)