Now driving Denim, updated before 5 minutes. Screen doesn't flickers like before on German to which I flashed before 2 days
I flashed the Nordic firmware back in December. Had screen flickers from time to time (mostly at the beginning). The flicker showed up very rarely after some days. I even hard reseted twice. Same thing.
Now I restored my phone a couple of days ago with Lumia Recovery tool and got Denim over the air for my phone, on my carrier Vodafone. At the beginning same flicker, then it stopped. I wasn't pleased with this firmware as it seemed it didn't had enough tweaks in it (the one ending in 003 is the basic one). So I've flashed the German one for Vodafone, 007.
The 007 is the best one, at least for my phone. It had the same flicker but it went away.
I think that you either see it or you don't, depending on what actions are you doing when the phone just installed the OS. Maybe it's some sort of calibration.
* for tweaks I meant the fact that we all know the 930 amoled screen is not super responsive with text, it has ghosting problems or text blurring/breaking, depending what background you use. And with 007 this is more improved than in 003. For me at least, the blurring is just a little less visible, but ofc is still there.