What is the One UI 9 beta 2 build number for the Galaxy S25?

The second One UI 9.0 beta ships as S93xNKSUCZZI4 in South Korea and S9368XXUCZZI4 in India. Both end in I4, which is what distinguishes them from beta 1, which ended in HL. The Korean download weighs 643.16MB and the Indian one is roughly 0.66GB.

What does One UI 9 beta 2 fix?

Samsung lists three fixes: Wi-Fi connections that kept dropping, the Contacts app crashing intermittently, and translation errors in Bixby Vision. The release notes also mention unspecified new AI features without naming any of them.

Which phones can install the One UI 9 beta right now?

This build is for the Galaxy S25, Galaxy S25+ and Galaxy S25 Ultra. The Galaxy S25 FE, Galaxy Z Fold7 and Galaxy Z Flip7 are in the same beta programme but have not received this particular update. The Galaxy S25 Edge is not enrolled at all.

Which countries have the Galaxy S25 One UI 9 beta?

Samsung runs the S25 beta programme in India, South Korea, the United Kingdom and the United States. Beta 2 has appeared in Korea and India first. Samsung stages these releases in waves, so UK and US testers typically receive the same build a few days later.

How do I leave the One UI 9 beta and go back to stable?

Unenrolling through the Samsung Members app stops you receiving further beta builds, but it does not remove the beta software already installed. Returning to stable One UI 8 requires a factory reset or a manual firmware flash, so back up your data before you join.

One UI 9 Beta 2 Hits Galaxy S25: 643MB, Wi-Fi Fixes

What is actually in beta 2

Samsung's release notes list four items. Three are fixes for problems testers hit in the first build:

Wi-Fi connection drops — improved, per Samsung's own wording, rather than declared solved.
Contacts app crashing — the intermittent shutdowns in the first beta are addressed.
Bixby Vision translation errors — fixed.
New AI features — added, but not itemised anywhere in the notes.

That last line is the frustrating one. Samsung has not said which AI features arrived, which is normal for a mid-cycle beta drop and normal for anyone hoping to know what changed before they download it.

The build numbers, region by region

Two regional builds are in circulation so far, and they differ only in the carrier and region codes Samsung appends:

South Korea: S93xNKSUCZZI4, 643.16MB
India: S9368XXUCZZI4, roughly 0.66GB

The I4 at the end is what separates this from beta 1, which shipped on 1 September as S93xNKSUCZZHL in Korea and S93xBXXUCZZHL in India. If your build still ends in HL, you are on the first beta.

Which phones and which countries

This drop is for the three standard S25 models only: the Galaxy S25, S25+ and S25 Ultra. The Galaxy S25 FE, Galaxy Z Fold7 and Galaxy Z Flip7 are all enrolled in the same One UI 9 beta programme, but none of them has received this particular build. The Galaxy S25 Edge is not part of the programme at all.

Samsung runs the S25 beta in four markets — India, South Korea, the United Kingdom and the United States. Beta 2 has surfaced in Korea and India so far. Samsung releases these builds in waves rather than everywhere at once, so UK and US testers should expect the same version within days rather than weeks, though Samsung has not committed to a date.

How to get it, and how to get out

Enrolment runs through the Samsung Members app, not the Settings menu. Open Samsung Members, look for the One UI beta programme banner on the home screen, register with the Samsung account you use on the phone, then go to Settings > Software update > Download and install. Registration slots are capped in each country and Samsung closes them without warning once they fill.

Leaving is less pleasant. Unenrolling in Samsung Members stops future beta builds, but the only way back to stable One UI 8 is a full factory reset or a manual firmware flash — you cannot simply roll back over the top. Back up before you install anything, and think twice about running a beta on the phone you rely on.

Where this sits in the wider rollout

The S25 programme is running well behind the Galaxy S26, which has been in the One UI 9 beta since May and reached its sixth build in late August. Samsung has also been seeding One UI 9 Watch betas to older Galaxy Watches in parallel.

None of that tells you when a stable Android 17 release reaches the S25. Samsung has not announced a date. If beta 2's fixes hold up and a beta 3 arrives on a similar weekly cadence, the usual pattern points to a stable rollout landing after the S26 series has finished its own. For now, this is a bug-fix build for people already testing — not a reason to join.