Almost immediately after the announcement of the Android 17 update, Samsung, according to an insider, began internal testing of One UI 9 for the Galaxy S25 lineup. Moreover, they did this approximately two weeks earlier than last year with One UI 8. If the information is confirmed, Galaxy S25 owners may receive the new firmware noticeably earlier than they’re used to waiting. Let’s note right away: this is a rumor. The source is insider Tarun Vats, who has a good reputation on Samsung topics, but there is no official confirmation from the company. So we treat this news with the usual caution expected for pre-release leaks.

The update should arrive this summer

What We Know About One UI 9

According to Tarun Vats, Samsung has already launched internal testing of One UI 9 for Galaxy S25. The first test build has surfaced, but its version is encrypted, so extracting details from the build number isn’t possible yet.

The key point is that the timeline appeared earlier than usual. A year ago, the first internal build of One UI 8 for Galaxy S24 was spotted only on June 19. This time, the test build of One UI 9 for Galaxy S25 appeared approximately two weeks ahead of that schedule. This could indicate that Samsung’s team got to work on development faster than in the previous cycle.

When to Expect the One UI 9 Beta for Galaxy S25

Responding to questions under his post, the insider suggested that the One UI 9 beta program for Galaxy S25 could launch as early as this month, although July is also not ruled out. It’s important to understand here: beta timelines can easily shift, especially if unexpected issues arise during development.

A beta is an early public version of firmware that you can install voluntarily to be the first to try new features. The price for being an early adopter is paid in stability: betas more frequently contain bugs and inconsistencies, so installing it on your primary phone should be done with caution.

One UI 9 for Other Smartphones

Here the news is less encouraging. When asked whether Samsung would repeat the same early schedule for Galaxy S24, the insider replied that this shouldn’t be expected anytime soon. According to him, noticeable signs of One UI 9 activity for Galaxy S24 may only appear next month.

Galaxy S24 owners will have to wait

In other words, last year’s flagships are following in the second wave as usual. This is standard practice for Samsung: newer models receive major updates first, while older ones traditionally catch up a bit later. If you have a Galaxy S24, there’s no need to panic — the update will reach you, just some time after the release for S25.

What’s useful to take away right now:

  • Galaxy S25 will very likely be in the first wave of One UI 9
  • The beta could launch in the coming weeks, but the exact date is not confirmed
  • Galaxy S24 owners will have to wait longer
  • The leak doesn’t reveal any new One UI 9 features yet

By the way, while you’re waiting for the new firmware, you can brush up on basic tricks. For example, on the Galaxy S25 Ultra, a screenshot is taken by simultaneously pressing the power button and volume down, or by swiping the edge of your palm across the screen if the corresponding gesture is enabled — this feature doesn’t depend on One UI 9 and works right now.

When Will the Stable Version of One UI 9 Be Released

In short: Samsung appears to have accelerated the development of One UI 9, and Galaxy S25 may receive the new system earlier than usual. If the beta version comes out in June, then the stable firmware could appear as early as August 2026.

We expect the stable version this summer

For now, this is all at the level of internal builds and insider responses on social media. We’re waiting for official information from Samsung — that will settle the questions about timelines and the content of the update. It should appear in the near future.