Samsung has started pushing One UI 8.5, based on Android 16, to the Galaxy S25 FE, with the first rollout happening in South Korea and carrying the June 2026 security patch. The update is small at about 324 MB, but it marks the first appearance of Samsung’s latest software layer on the Galaxy S25 FE, while other regions wait their turn.
The build number is S731NKSS7BZF1, and the rollout reportedly began on 10 June 2026. That timing fits Samsung’s usual playbook: launch in one market, watch for bugs, then widen distribution in stages. It is boring, yes, but also how you avoid a thousand angry forum posts before lunch.
One UI 8.5 changes on the Galaxy S25 FE
Samsung is not advertising a dramatic redesign here. One UI 8.5 is described as bringing general interface improvements, better stability, and updated security protection. In other words, this is the kind of update that rarely makes for flashy screenshots but usually matters more than a new wallpaper pack.
- Software: One UI 8.5
- Base: Android 16
- Security patch: June 2026
- Build number: S731NKSS7BZF1
- File size: about 324 MB
When One UI 8.5 should reach other countries
For now, the update is limited to South Korea, according to the report from Tarun Vats. Users outside the country should expect a staggered release over the next few days or within a week, which is typical Samsung behavior for major firmware pushes across regions and carriers.
If you own a Galaxy S25 FE elsewhere, the safest move is simple: check the ”Software update” section in settings and keep checking. Samsung’s regional rollout model often rewards patience more than refresh-button obsession, though that won’t stop anyone from hammering refresh anyway.
Samsung’s broader One UI rollout strategy
This is also another reminder that Samsung likes to move software first on a controlled schedule, not a global blast. That approach has its advantages: fewer bad surprises, easier carrier coordination, and a cleaner path for fixing bugs before they spread everywhere. Competitors such as Google and Apple take different roads, but Samsung’s method is still the one most likely to keep a firmware headache local.
What happens next is predictable enough. If the Korean rollout stays quiet, One UI 8.5 should expand quickly to more markets, and the Galaxy S25 FE will quietly become one of the first non-foldable Samsung phones to show what the company has been polishing in Android 16.