A few days ago Nokia released the long-awaited first firmware update for the N950 at:
http://www.developer.nokia.com/info/sw.nokia.com/id/db230178-aa63-4c73-ba7f-20930da13cad/Nokia_N950_OneClickFlashers.html
As Tuesday and Wednesday were such busy days for me, I didn't want to risk bricking my phone. But today I bit the bullet and installed the upgrade, making sure to take backups first of course. Some random experiences, I will update this as I encounter more:
- Generally the device responsiveness is lots better - scrolling is smoother, there are less delays etc. Feels very good now.
- I restored backups. Upon completion it said something about not being able to restore everything, but then rebooted faster than I could read the notification.
- To restore backups, I had to copy my backup file from my PC via USB, then manually move it from /home/user/MyDocs/Backup0 to /home/user/MyDocs/.backups so that the Backup application was able to see it.
- After reboot, all Contacts were missing in Contacts app. However executing "tracker-search -c" on the command line revealed I do have some contacts. After waiting for a while, a part of my contacts started appearing in Contacts app. A few minutes later, they were all there - so if you're worried you lost your contacts, just wait.
- There is now an official Twitter app and Twitter feeds show up in the feeds page
- The famous swipe downwards to close an app gesture can now be enabled from Display settings.
- There's a SIM menu (or what you call it) thats shows my operator's services that are on my SIM
- Feeds view can show weather as well. Default is Helsinki, Finland for some reason

- There is Angry Birds, and it works very fast and smoothly, much better than on WinPhones for example!
- Developer mode now has to be separately enabled in settings, but after you do it, Terminal and the usual goodness reappears
- Markings on "Developer Edition" are gone
- Ovi Store app no longer crashes all the time, and there is Ovi Music.
- Upon starting Maps, it asks me for an username and password. It doesn't say what service they are for, but I assumed it's the Nokia ID, which was correct.
- There is a WiFi Hotspot app, which is very welcome!
- Terminal app has gained new features, an ability to switch between an Shell and Arrows toolbar with the swipe gesture among them
Dealing with duplicated contacts on the N950/N9
I had problems with duplicated contacts. I tried a couple of different solutions, but the one that worked was: export all contacts as vcard files (.VCF). Then delete all your contacts in the contacts app. After that, you can delete .VCF files that match the pattern
(?).VCF (because duplicate contacts will be dumped with file names like JANEDOE.VCF, JANEDOE(2).VCF, JANEDOE(3).VCf etc.) and finally, re-import these VCF files using vcardconverter. Watch out, vcardconverter will fail if you have "funny characters" in filenames, so it's a good idea to wrap it around in a for statement, something like this: for i in .VCF;do cp $i tmp.vcf;vcardconverter tmp.vcf;done;rm tmp.vcf.