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I have a Samsung Galaxy S23 Ultra running Android 13. I am considering upgrading it to Android 14. Can one downgrade a Samsung Galaxy S23 Ultra from Android 14 to Android 13?

I found https://flash.android.com/ but Samsung Galaxy is not listed amongst their supported devices.

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One can use Samsung's Odin (firmware flashing software) to downgrade a Samsung Galaxy S23 Ultra from Android 14 to Android 13 (by flashing the device to Android 13, which means all data/settings will be lost):

Although none of the publicly available downloads are authorized by Samsung itself, XDA-Developers consider the files offered on their Forum (Patched Odin v3 3.13.1 for windows) (Odin v4 1.2.1 for linux) the safest option.

Alternatively, one may use Heimdall (open-source).

Thanks Reddit for pointing me to Odin.

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    Just want to confirm if this has been tested and worked? Because Android has downgrade protection depending on the bootloader version.
    – Andrew T.
    Commented Nov 8, 2023 at 7:12
  • @AndrewT. Good point, I haven't tested and I haven't read yet anyone who did test it. Commented Nov 10, 2023 at 6:33
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I've seen a couple of videos saying it's possible but I don't think it works on all devices, it could be for some specific versions of bootloader. I tried downgrading mine from Android 14 (One-UI 6.0) to Android 13 (One-UI 5.1) but failed when trying to flash with Odin. I was only able to flash the latest version and not old versions. My Samsung is S23 Ultra (SM-S918B)

Error encounter: sw rev check fail abl fused 3 binary 1

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