OneOS

byChar0n · Tools

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AI summary

Runs a second Android system alongside One UI on rooted Samsung Galaxy phones, with switching from the app and no flashing required. Version 0.4.96 improves switch error reporting and guest restarts.

Generated by AI. May contain inaccuracies.

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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.

tools root android system samsung open source

What's new

v0.4.96Nov 12, 2026

OneOS 0.4.96: a switch that cannot start says why; Restart guest on slower phones Update from the Update banner on the app's launch screen, or install the APK from SourceForge: https://downloads.sourceforge.net/project/oneos-mirror/v0.4.96/OneOS-0.4.96.apk
After updating, open each system's page and tap Update to get both fixes.
A switch that stayed on "Shutting down One UI": right before it changes anything, the switch checks the phone once more and can still refuse to start. The app did not hear about that: its screen stayed on "Shutting down One UI" while One UI kept running, and the reason was only in the log (a Galaxy S23 on 0.4.95, twice: after several switches without a restart One UI had run out of room for settings). Now the app waits for that check and shows the reason. For this one it says "Restart your phone first". Restart guest (root for the guest): Restart guest, the step that applies a module change, stops the guest's processes and starts the system again. Finding the guest's processes took about 50 seconds a round on a Galaxy A34; the restart ran into its two-minute limit and the phone went back to One UI instead, twice in a row (a report on 0.4.93). Now each round reads all processes in one go and looks closely only at those that can be the guest's. What gets stopped is decided exactly as before. Not tried on a phone yet (neither fix): if a switch still stays on "Shutting down One UI", or Restart guest still ends in One UI after this update, please send a report from the app.
That is everything that changed since the 0.4.95 release.