Got the fw of the first step, generic world or something like that.
I'm not sure about this version (region), but I flashed Generic Trade Central Europe 1 version 42. Then rooted and updated OTA to version 62. Root remains....
but to debrand don't I need root or an unlocked bootloader?
because the thread title says: "root without unlocking bootloader", so this applied only to carrier free phones? :(
I believe you will be able debrand with wotanserver. Go to wotanserve...