How to Flash One UI 9 Firmware on Galaxy S26 with Odin
Step-by-step guide to installing official One UI 9 firmware on the Galaxy S26, S26+ and S26 Ultra with Frija and Odin, without losing your data.
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Step-by-step guide to installing official One UI 9 firmware on the Galaxy S26, S26+ and S26 Ultra with Frija and Odin, without losing your data.
Updated to One UI 9 and want to go back? Here is how to downgrade the Galaxy S26, S26+ and S26 Ultra to One UI 8.5 with Odin while the bootloader binary still allows it.
Use CSC for a clean Samsung firmware install or HOME_CSC when you want to keep data during a compatible update.
Download Odin 3.14.4 for Windows and prepare a Samsung firmware flash with model, CSC, driver and data-safety checks.