Please note that you will not be able to receive OTA updates after installing the Android One UI, either from Samsung or your carrier. We’re not sure if this will change in the future, though its likely you will be able to download the official release and flash it via Odin once it becomes available, overwriting the unofficial leak version and allowing you to do OTA updates again.
Requirements:
Please note the instructions vary slightly per device, so follow only the instructions specific to your Galaxy S9 / S9+ variant.
Galaxy S9 Exynos
Galaxy S9 Plus Exynos
Galaxy S9 Snapdragon
Galaxy S9 Plus Snapdragon
Samsung to Mostly Include Snapdragon Processors in its Upcoming Galaxy S23…Samsung Exynos Xclipse 920 GPU is Only 17% Faster Than Previous-Gen Exynos 2100…Next-Gen Exynos 1000 SoC Under Active Development With Powerful Cortex-A78 Cores…How to get Official Oreo on Exynos Samsung Galaxy S8 and S8 Plus