Flashing wipes your internal storage. Back up your photos, contacts, and documents to a cloud service or PC.
Flashing a custom ROM will trip Knox (permanently disabling Samsung Pay and Secure Folder). It also wipes your data. Back up your photos and files.
Do you prefer a or Samsung's One UI ?
To use banking apps or Google Wallet, you may need to apply Play Integrity fixes via Magisk modules, as custom ROMs inherently trip Google's security checks.
As of April 2026, the custom ROM scene for the Note 9 is focused on bringing the latest Android versions to its ageing but capable hardware. While the Snapdragon variants (crownqlte) face bootloader restrictions, the Exynos (crownlte) crownlte custom rom updated
: Custom kernels like those bundled with DuhanROM or FloydROM improve animation speed and app opening times significantly compared to the original Android 10 stock firmware.
Regularly updated by developers to optimize camera functionality, processing speed, and modern Samsung features on the older Exynos chip. 3. Pixel Experience / Evolution X Flashing wipes your internal storage
: If privacy is your priority, unofficial builds of /e/OS-a15 (based on Android 15) are actively maintained, providing a de-Googled environment for the Note 9. Key Features & Performance Updates
Lacks deep S-Pen integration and original Samsung camera features. Focuses on privacy and longevity without Google bloat. Weekly/monthly security updates; highly stable. It also wipes your data
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