The One UI 9 rollout reached the Galaxy S26, S26+ and S26 Ultra on 16 September 2026, Samsung said, starting in South Korea. Samsung named no date for any other handset. The 28 September date circulating for the Galaxy S25 comes from Samsung Thailand, not from a global announcement.
What Samsung Actually Announced
Samsung’s announcement covers three phones and no dates beyond them. The company said the stable One UI 9 update had begun reaching the Galaxy S26, Galaxy S26+ and Galaxy S26 Ultra, and that “the update is expected to gradually roll out to other Galaxy devices”.
That is the whole of the official schedule. Samsung has not published an overall priority list showing which Galaxy models are next or when, and its announcement does not name Android 17 at all, although the outlets that have installed the build report it as the S26 series’ first full Android version jump.
As of 21 September 2026, the Galaxy S26, S26+ and S26 Ultra are the only devices Samsung has publicly named as receiving the stable One UI 9 rollout, and South Korea is the only market it confirmed by name.
Where the 21 and 28 September Dates Come From
They come from Samsung Thailand, which published a country schedule that other markets have been reading as a worldwide plan. Two outlets reported the same document independently, both attributing it to the Thai operation, and both cautioning that it is a Thai timetable.
| Devices | Date in the Thai schedule |
|---|---|
| Galaxy S26, S26+, S26 Ultra | 21 September 2026 |
| Galaxy S25, S25+, S25 Ultra, Z Fold 7, Z Flip 7 | 28 September 2026 |
| Galaxy S23 FE | October 2026 |
Android Authority, which reported the schedule on 17 September, put the Galaxy S25 series at 28 September while noting the dates are technically for Thailand and should not be treated as a confirmed worldwide schedule. Samsung updates usually reach nearby markets within days or weeks of a national launch, so the dates are a reasonable signal of sequence. They are not a promise about any particular country or carrier.
One firm data point sits underneath all of this: Samsung opened One UI 9 beta testing for the Galaxy S25 on 1 September 2026 in selected regions, and has announced no stable release date for that series.
What Came Before the S26
The S26 series is not the debut. One UI 9 shipped in stable form on 22 July 2026 with the Galaxy Z Fold 8, Z Fold 8 Ultra and Z Flip 8, and the Galaxy S26 FE arrived with it pre-installed on 4 September 2026, according to reporting from tech-ish. The S26 flagships followed after roughly four months of beta testing.
The ordering matters for anyone trying to guess their own turn. Samsung is moving newest first, which puts 2024 and 2023 handsets late in the queue. That pattern held for earlier releases too, including the One UI 6.1 rollout to older Galaxy phones.
What One UI 9 Adds
Samsung’s announcement lists eleven changes, grouped around video, daily summaries, device upkeep and security.
- My FanCam: Tracks a chosen person in a recorded video and keeps them centred as the scene moves.
- Generative and editable cards: Lets users reshape the daily Now Brief summary with health, weather and video information.
- Now Nudge: Surfaces context-aware prompts such as event details and reservations.
- Creative Studio: Suggests image-generation ideas tied to upcoming events in the calendar.
- Warranty and Care: Puts warranty checks, diagnostics, repair estimates and service booking inside Settings.
- Interpreter: Adds a thread view for translated conversations, with faster translation.
- Document Scan: Handles difficult originals better and improves the eraser tool.
- Voice Recorder: Presents transcript summaries using headings and tables.
- Security Brief: Flags malware and permission problems.
- Privacy Alerts: Reports background attempts to use permissions the app does not need.
- Scam Detection: Expands to Japan, Canada and India.
Privacy Alerts is limited to specific Galaxy S, Z and Tab S models, and Scam Detection availability varies by country. The S26 build also carries the September 2026 Android security patch.
How to Check Whether It Has Reached Your Phone
- Open Settings: Scroll to Software update.
- Tap Download and install: The phone checks the server for your exact model and carrier variant.
- Check the version afterwards: Settings, then About phone, then Software information. The One UI version should read 9.0.
- If nothing appears: Carrier-locked handsets usually trail unlocked ones, and Samsung releases in waves rather than to every device in a country at once.
SamMobile reported the Korean firmware as version S94xNKSU4BZ16 for the S26 line, with the S26 Ultra on S948NKSU4BZI6; that build identification comes from a single outlet. The download is around 550MB for phones coming off the beta and larger for everyone else.
Which Devices Are Expected to Qualify
Samsung has not published an eligibility list for One UI 9. The lists in circulation are compiled by specialist sites from Samsung’s stated support windows, and cover the Galaxy S, Z Fold, Z Flip, A, M and F phone series plus Tab S and Tab A tablets, generally from 2023 models onward.
Treat those as informed expectations rather than confirmation. Until Samsung names a device, the only certainty is that it has not been named.
What Samsung Has Not Said
There is no announced stable date for the Galaxy S25 series, the Galaxy Z Fold 7 or the Z Flip 7 outside the Thai schedule. There is no published market-by-market timetable, no eligibility list, and no statement on when the A and M series will be reached. Samsung has also not said whether the eleven features arrive complete on every eligible device or in stages.
FAQs
When Did the One UI 9 Rollout Start?
Stable One UI 9 first shipped on 22 July 2026 with the Galaxy Z Fold 8 and Z Flip 8. Samsung announced on 16 September 2026 that it had begun reaching the Galaxy S26, S26+, and S26 Ultra, beginning in South Korea.
When Does the Galaxy S25 Get One UI 9?
Samsung Thailand’s schedule lists 28 September 2026 for the Galaxy S25 series. That is a Thai date. Samsung has announced no stable release date for the S25 in other markets.
Is One UI 9 Based on Android 17?
Outlets that have installed the S26 build report it as Android 17 with the September 2026 security patch. Samsung’s own rollout announcement does not name the Android version.
How Do I Get One UI 9 on My Galaxy Phone?
Open Settings, choose Software update, then Download and install. If nothing is offered, the update has not reached your model, region or carrier yet.
Which Galaxy Phones Will Get One UI 9?
Samsung has published no eligibility list. Lists compiled by specialist sites cover the Galaxy S, Z Fold, Z Flip, A, M and F series and Tab S and Tab A tablets from roughly 2023 onward, but none of that is confirmed by Samsung.
