Με την αναβάθμιση σε Oreo περιορίζεται πολύ η δυνατότητα flash μέσω Odin:
https://www.xda-developers.com/samsung-galaxy-s8-note8-bootloader-odin/
"Since Prince Comsy Odin no longer works with this new bootloader, that means that any builds that are not officially signed by Samsung will not flash. This also means that if you have a Canadian phone and want to flash the U.S. firmware, you can no longer do so. This is because even though they are signed by Samsung, the model numbers do not match. Unfortunately that also means Note8 owners with the carrier Note8 devices cannot flash the US unlocked firmware. If you try to flash the carrier unlocked firmware on carrier phone, it will hard brick your phone. Currently, there is no way to restore from a hard brick in Odin from the new bootloader."