• Source:JND
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Samsung has finally begun rolling out their stable One UI 8 update based on Android 16 for the Galaxy S25 series in South Korea, with global roll-out scheduled over the coming weeks; specific dates for specific markets like US, UK and India still yet to be confirmed.

Samsung S25 One UI 8 Update Details

Build number: S938NKSU5BYI3 / S938NOKR5BYI3 / S938NKSU5BYI3 (varies by region)

Download size: 3.8GB

Security patch: September 1, 2025

First spotted by: Tipster Tarun Vats (@tarunvats33 on X)

The changelog highlights include:

- Automatic call captioning for improved accessibility.

- Now Brief, a new contextual feature offering real-time updates in a compact snapshot.

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How to Download One UI 8 on Samsung Galaxy S25?

Users will get a notification once the update reaches their device. For manual installation:

1. Go to Settings

2. Select Software update

3. Tap Download and install

Wider Rollout and Device Coverage

So far, the stable One UI 8 was restricted to Samsung’s latest foldables – Galaxy Z Fold 7, Galaxy Z Flip 7 and Galaxy Z Flip 7 FE. Samsung has expanded the update besides the S25 with Galaxy S25 FE and some mid-range models.

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Although Samsung has not provided a complete schedule of supported devices, the update is anticipated to eventually go live for additional models from both the S and A family in the coming weeks.

One UI 8 Watch Incoming

Samsung also announced that One UI 8 Watch will make its way out from the Galaxy Watch 8 series later this year. A precise implementation schedule for the wearables update was not yet announced.

Bottom Line

Stable One UI 8 update now going out to Galaxy S25 series Samsung is rolling its Android 16-based software experience out to additional devices. The accessibility updates, AI-driven tools and wider device support brings it a step closer to Samsung’s strategy of further integrating the ecosystem between its smartphones and wearables.