If you bought the S9 Plus for Samsung's feature-rich ecosystem (Secure Folder, Samsung Pay, Galaxy Wearable, etc.), you will want a One UI Port. These ROMs take the latest firmware from newer Galaxy devices (like the S24 FE or S22 Ultra) and backport it to the Exynos 9810.
The installation process was relatively smooth, but I had to do some research to find a reliable source for the ROM and the necessary tools. I opted for the popular ROM, which is known for its stability and feature-rich experience. I followed a well-documented guide on XDA Developers, and after a few reboots, I was up and running with my custom ROM. samsung s9 plus exynos custom rom
Return to the main Settings menu, open , and toggle on OEM Unlocking and USB Debugging . If you bought the S9 Plus for Samsung's
If banking apps refuse to open, install Magisk , enable Zygisk, and use the "Play Integrity Fix" module to bypass safety checks. I opted for the popular ROM, which is
Breathing New Life into the Samsung Galaxy S9 Plus (Exynos): The Ultimate Custom ROM Guide
: The gold standard for a "clean" Android experience. Official and unofficial builds of LineageOS 21 (Android 14) or higher are available, offering significant performance improvements by removing Samsung's heavy software skin. You can find these on the LineageOS Downloads page or community threads.