When I flashed one of the original Knox safe rooted firmwares, it inadvertently changed my CSC.
I have managed to get it back to what it should be, but the key is to use the same version as the one currently on the phone.
At the time it was MJ1 that was installed on my phone, and it was only variants of that version I used to get back to normal. The problem is when someone tries to downgrade. It wasn't really an exact science to getting it back to BTU either. More of a trial and error thing. I flashed, BTU firmware, wiped, opened recovery to check the CSC status, it still showed the wrong one, flashed again, loaded the phone up into the setup (as the phone gets wiped when changing CSC) was still bringing a foreign setup process, wiped and flashed again checked recovery and eventually it ended up where it should be.
So I think you should be able to debrand and the CSC with it to get official updates. But since they released the Note 3, flashing has become greater risk.
Sent from my SM-N9005 using Tapatalk
Current Device: Model: Samsung Galaxy Note II, Galaxy Note 10.1 GT-N8000 & GT-N5100, & Galaxy Camera EK-GC100
Retired but still own: Samsung Galaxy Note GT-N7000 - Dell Streak - HTC Touch Pro 2,
and HTC Kaiser - MDA Vario III
Used to own:Galaxy Tab 10.1 GT-P7500 - Samsung Galaxy SII - HTC Desire
- HTC Hermes (MDA Vario II) - Raphael - HTC Touch Pro
HTC Wizard (MDA Vario)
- O2 XDA IIi
- HTC Magician (MDA Compact)