Galaxy S25 One UI 9 Stable Update Starts Rolling Out in Korea

Samsung closed the Galaxy S25 beta and pushed Android 17 to South Korea first. Owners elsewhere have no confirmed date.

Samsung started rolling out the Galaxy S25 One UI 9 stable update in South Korea on September 28, 2026. The Android 17 build reached beta testers on the Galaxy S25, S25+ and S25 Ultra first, according to SamMobile. Samsung has not announced timing for any other country.

What Happened and Why It Matters

Samsung ended the One UI 9 beta program for the Galaxy S25 series and replaced it with a finished build. SamMobile reports the release carries firmware version S93xNKSUCDZIF. The "x" stands for the model digit, so the same build covers all three phones.

Android Authority reports that the rollout goes beyond testers. Korean owners coming straight from One UI 8.5 also see the update, as a much larger full package. Android Authority adds that the Galaxy Z Fold 7 and Z Flip 7 are getting stable One UI 9 in Korea too.

The Galaxy S25 becomes the second Galaxy S line on stable One UI 9, after the Galaxy S26. That matters because Samsung's rollout has moved slowly outside Korea this cycle. Google shipped Android 17 to Pixel phones back in June, as PhoneArena noted.

How One UI 9 Reached the Galaxy S25

One UI 9 debuted on the Galaxy Z Fold8 Ultra, Z Fold8 and Z Flip8. Samsung then began the wider rollout on September 16 with the Galaxy S26 series in Korea, per Samsung Newsroom.

The Galaxy S25 got its third beta on September 17. SammyGuru.com reported that build ZZIC fixed bugs in the notification panel and the camera app. That small changelog hinted the stable release was close.

Samsung's dates have shifted along the way. Samsung Thailand first listed September 21 for the Galaxy S26 and September 28 for the Galaxy S25 and Z7 foldables. Android Central reported that Samsung later replaced those dates with a general "within September" window in Thailand.

The Galaxy S26 then reached T-Mobile customers in the US on September 23, according to SammyGuru.com's rollout tracker. Most other markets are waiting on the S26 too. So what does that pattern mean for your S25?

Key Details of the Galaxy S25 One UI 9 Build

Samsung has not published an official changelog page for these builds. Android Authority says Samsung's Korean software update pages had not been updated when it reported. The details below come from firmware screenshots and outlet reports.

The size gap has a simple cause. Beta testers already run most of One UI 9, so they only need a small package to reach the stable branch. Everyone else downloads the whole Android 17 upgrade.

Android Authority reports the update screens list the September 2026 security patch. Sammy Fans reports that the Galaxy Z TriFold is receiving stable One UI 9 in Korea as well.

What One UI 9 Brings to Your Galaxy S25

Samsung's September 16 announcement lists the headline One UI 9 features. Most depend on a Samsung account, and Samsung warns availability varies by country, language and device.

• My FanCam tracks a chosen person in a recorded video and reframes the clip to keep them centered.
• Now Brief gains editable cards for health, weather and video.
• Warranty and Care moves coverage checks, diagnostics, repair estimates and Samsung Care+ into Settings.
• Now Nudge offers context-aware suggestions, such as saving a location shared in a chat.
• Interpreter adds a Thread View for following translated conversations.
• Security Brief and Privacy Alerts flag malware, risky permissions and background access attempts.
• Scam Detection expands to Japan, Canada and India.

One detail deserves a closer look. Samsung's footnote for Privacy Alerts names the "Galaxy S25" and "S25 FE." It does not name the S25+, S25 Ultra or S25 Edge individually. Samsung has not clarified whether that reflects shorthand or a real limit.

Our One UI 9 features and rollout guide covers each feature in more depth.

What's Confirmed and What's Still Unclear

Confirmed: Stable One UI 9 is rolling out to the Galaxy S25, S25+ and S25 Ultra in South Korea, per SamMobile and Android Authority.
Still Unclear: Samsung has not named a date for the US, UK, Europe, India, Nigeria or any other market.
What It Means: Korea goes first for most major One UI releases. Expect other regions to follow in waves.

Confirmed: The firmware build, security patch and download sizes appear in screenshots reported by Android Authority and SamMobile.
Still Unclear: Samsung has not issued a press release or updated its Korean changelog pages for the S25 build.
What It Means: Treat the reported sizes as close estimates. Your phone's update screen shows the exact figure.

Confirmed: Sammy Fans reports stable builds for the Galaxy S25 FE and S25 Edge in Korea.
Still Unclear: Outlets have not confirmed whether non-beta S25 FE owners receive the update on day one.
What It Means: FE and Edge owners in Korea should check manually over the next few days.

Confirmed: SamMobile expects other regions to get the S25 update later this week or next week.
Still Unclear: Samsung has not endorsed that timeline, and its Thailand dates changed twice.
What It Means: Plan around a range of dates. Do not count on a specific day.

What This Means for You

Are you enrolled in the One UI 9 beta? Open Settings → Software update → Download and install. The stable build should appear as a small package that ends your beta enrollment.

Outside Korea, your Galaxy S25 has nothing to download for now. Samsung's staged rollouts also vary by carrier, so an unlocked phone may update before a carrier model.

PRO TIP: Back up your phone with Samsung Cloud or Smart Switch before a major Android upgrade. Keep at least 5GB free, since the full package weighs close to 4GB.

Not sure which Galaxy models qualify? Our One UI 9 eligible devices list tracks the phones and tablets expected to get the update.

Frequently Asked Questions About the Galaxy S25 One UI 9 Update

Is the stable One UI 9 update available for the Galaxy S25?
Yes, in South Korea. Samsung began the rollout on September 28, 2026, starting with beta testers, according to SamMobile.

When will the Galaxy S25 get One UI 9 in the US, Europe or India?
Samsung has not announced a date. SamMobile expects other regions later this week or next week. Samsung has not confirmed that timeline.

How big is the Galaxy S25 One UI 9 update?
Beta users see about 500MB to 535MB. Android Authority reports a 3,851.56MB package for S25 Ultra owners coming from One UI 8.5.

Which Android version does One UI 9 use?
One UI 9 runs on Android 17. Samsung's Galaxy S26 and Z8 foldables received it first.

Is the Galaxy S25 FE getting One UI 9?
Sammy Fans reports a stable build for the S25 FE in Korea. Samsung has not published a date for other regions.

Check your phone under Software update once a day this week, especially if you live in a beta market like the US or UK. Our One UI 9 coverage will add each new region as Galaxy S25 owners confirm it. Has the Galaxy S25 One UI 9 update reached your phone? Tell us your model, country and carrier in the comments.