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 0.4.85 adds Galaxy A support fixes and other device-specific fixes.

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.

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What's new

v0.4.85Nov 11, 2026

OneOS 0.4.85: Galaxy A phones are no longer "not supported", and fixes from your reports Update from the Update banner on the app's launch screen, or install the APK from SourceForge: https://downloads.sourceforge.net/project/oneos-mirror/v0.4.85/OneOS-0.4.85.apk
After installing, tap Update on your system's page.
Galaxy A phones on One UI 8 or 8.5 Phones with OxygenOS 16 (A15, A16, A17, A25, A33, A34, A35, A54, A55 and the others) were called "not supported" or "One UI was updated" whenever the app had no set-up system to go by: it measured them against Android 17. Fixed. Phones whose systems are all Android 17 (A56, A57, A36, A27, S24 FE, Z Flip7 FE, S25 FE) on One UI 8.5 now say what to do: update One UI first. The device report no longer says "Not supported" for low free space when a system is already set up.
Fixes from reports
OxygenOS 16 on the Galaxy A25 and A33 no longer stays on a black screen. OriginOS 7 on the Galaxy S23 and S24 series stopped after about a minute on every try. vivo's refresh-rate manager refused all of the phone's display modes; it is now switched off on those phones. Not yet run on a real S23 or S24: please send a report. OxygenOS and ColorOS get the folder their system font link lives in.
Still open
OxygenOS 16: text missing in web pages (Google sign-in, results pages, blank pages in some apps). The cause is not found yet; this version logs what is needed. If you see it, send a report with full logs from 0.4.85. Galaxy A57, incoming SMS: this version logs the radio library's details; one report with full logs from an A57 is what we need.