Overview
- Samsung started the stable One UI 9 rollout for the Galaxy S26, S26+ and S26 Ultra, which began Wednesday, September 16 in South Korea and has since moved into additional markets.
- One UI 9 is built on Android 17 and packages new Galaxy AI tools such as My FanCam, Now Brief’s generative and editable cards, Now Nudge, Creative Studio, Interpreter improvements, Document Scan and Voice Recorder summaries.
- The stable S26 release includes the September 2026 Android security patch, which delivers dozens of critical and high‑severity fixes from Google and Samsung.
- Samsung is deploying the update in staged waves with regional timelines that show the S25 series and Z Fold/Flip 7 slated to begin receiving One UI 9 around September 28 and other models, including some S23 variants, expected in the following weeks.
- Not all devices will get the full set of advanced AI features because some capabilities require higher RAM and compatible chipsets, so older or midrange phones will receive the UI, camera and security improvements but may miss deeper Gemini‑powered functions.