Yay, successful flash here with unbranded phone & carrier from Netherlands! Thanks Vega! It gave some warning with "product ID not detected yet, proceed? " to which I answered yes and it all went great and only took a couple of mins!
(misread the instructions too; to the other ones like me: don't connect your phone until the final steps)
Just a tiny warning: t
he backup and restore for texts etc. only works if your mobile has internet via a sim during first bootup. In my case it thought it was roaming, which was apparently disabled. So I couldn't restore any of these things. But also wrong (default) APN settings can cause this, and because there's no way to change any of these settings, you won't be able to restore them. (restore ONLY works at that point, first boot, with no WIFI option)
Anyway the update did do a lot of good though:
1. FIXED:
Problem with the touch screen sometimes not working when trying to unlock phone, requiring 2x press of power button to turn screen off and on
2. FIXED: Notifications (Whatsapp working like a charm! Email "push" working too)
3. New: Data Sense! Yes it's working, and I'm willing to bet it's not because of my carrier
Overall I can say it finally feels stable and reliable. This was what I was hoping for
(and finally wp8 feels like it's worth recommending to friends and family)
Just wanted to give a headsup.
P.s The torrent's speeds are pretty good