Nokia Recovery Software Tool is the one you have to use.
All instructions are on Nokia.com.
If you use Beta versions or installing any other unofficial software you may lose your warranty.
THIS IS NOT A VALID SOLUTION. I AM RUNNING OFFICIAL WP 8.0 BLACK ON PHONE (NO PREVIEW) ONLY WP 8.0 BLACK. CAMERA WORKS GREAT. IF I SEARCH FOR UPDATES... Phone finds 8.1 / CYAN. Updating causes MAIN CAMERA TO DIE (when troubleshoting issue, its related to main camera). Downgrading to WP 8.0 BLACK GETS THE CAMERA WORKING... so your tip did not help me. I have tried to flash a other CYAN [ROM] also, same issue... so its not the scandinavian rom. If users having the same problem, theirs no solution for it =(
Luckily I had the files saved from the earlier downgrade from developers preview, when I upgraded to cyan. But if you don't have the files, it can be downloaded from nokia servers using nokia data package manager.Ok, then, my question is, how can I downgrade to WP8 GDR 3? It doesn't matter if I have the official 8.1 update? Thanks
I see that many are facing the same problem but Nokia refuses to acknowledge the problem or fix it, some people have reported that it is automatically fixed.
Nokia needs to speak up, else WPCentral needs to take the issue up with Nokia, this is a huge issue , esp the people who have upgraded via Dev Preview. This is such a pain. My camera has become useless.
If WPCentral posts an article on this issue maybe MS/Nokia will notice, I am sure there is a software fix for this.
I downgraded my WP 8.1 preview phone to WP 8.x but then decided to upgrade to WP 8.1 preview GDR 1 earlier today.
My camera works fine with 8.x but with WP 8.1 preview or WP 8.1 preview + GDR1 the camera app
crashes (camera does not work) and Nokia Maps keep crashing. Has anyone heard about this problem?
Phone works great with WP 8.x and has Lumia Black installed.