OneOS

byChar0n · Tools

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AI summary

Runs a second Android system alongside One UI on rooted Samsung Galaxy phones, switching between systems without flashing. Version 0.4.91 adds OxygenOS 16 setup support for Galaxy S23 models on One UI 8.0 or 8.5; this support is untested and may fail to start.

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About this app

OneOS runs a second Android system next to One UI on a rooted Samsung Galaxy and switches between the two without flashing anything. One UI stays installed; the other system lives in a folder on the phone and starts on One UI's kernel as a container with its own zygote and system_server. You switch from the OneOS app and come back with Back to One UI (the OneOS app inside the other system) or by holding Volume Up + Volume Down for 3 seconds.

License

OneOS is licensed under the Apache License 2.0. Parts of this repository come from other projects and keep their own terms: the OneLineage-derived session scripts (published with WeWaffles' permission). See NOTICE and CREDITS.md.

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What's new

v0.4.91Nov 11, 2026

OneOS 0.4.91: OxygenOS 16 on the Galaxy S23, S23+ and S23 Ultra still on One UI 8 or 8.5 Update from the Update banner on the app's launch screen, or install the APK from SourceForge: https://downloads.sourceforge.net/project/oneos-mirror/v0.4.91/OneOS-0.4.91.apk
Galaxy S23, S23+ and S23 Ultra on One UI 8.0 or 8.5 (Android 16): the app told these phones to update One UI first, because all of their systems were Android 17. They can now set up OxygenOS 16, the Android 16 system that already runs on the S22 series and the S23 FE. Not tested on the S23s yet: it comes with their "will most likely not start" note, and if the screen stays black OneOS returns to One UI by itself. Please send a report either way. On One UI 9 nothing changes for the S23s: their systems are the same five as before (OxygenOS 16 needs Android 16 underneath and is not offered there).
Nothing to update on a system's page this time: the scripts and files are those of 0.4.90.
Everything else is as in 0.4.90.