This is Noble rom, an android 11 custom rom for the Galaxy Note 9 and S9 by AlexisXDA on XDA. Although it is said to have some bugs, i have not encountered
Chcete Android 11 / One UI 3.1 pro váš Galaxy Note 9? Zkuste to takto
Samsung Galaxy Note 9 One Ui 3 & Android 11 Update🔥 Samsung Note 9 New Update Android 11 One Ui 3.0 - YouTube
Download Android 9.0 Pie One UI Beta for Snapdragon Galaxy Note 9 [Unlocked Variant]
Galaxy Note 9 will no longer get software updates, Galaxy Note 10 will get them once a quarter - SamMobile
Update Samsung Galaxy Note 9 to Android 11 with latest NOBLE ROM 1.3 based on One UI 3.1
Samsung Galaxy Note 9, aggiornamenti mensili al capolinea - HDblog.it
La One UI 3.1 e Android 11 arrivano anche su Galaxy Note 9 con Noble ROM | SmartWorld
Note 9 Android 11 update Answered - Samsung Members
Galaxy Note 9 in 2021 - Android 11 Port With NOBLE ROM 1.5 - YouTube
These Galaxy Devices Might Not Get Android 11 - Samsung Members
Third-party ROM brings Android 11 to the Galaxy Note 9 - 9to5Google
Aggiornamenti per Redmi Note 9 Pro, Samsung Galaxy S20 FE e tanti altri
Samsung Galaxy Note 9 gets One UI 3.1 port based on Android 11