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Galaxy S25 vs S26: Samsung is already testing One UI 9.5 on the S25

Internal test builds confirm Samsung is running One UI 9.5 on the Galaxy S25 — breaking its own upgrade hierarchy before the S26 has launched.

By Launch Day

The Mobile Desk · (3 hours ago)

Reported fromoutlet, credited1
Photo via Android Authority

Samsung is testing One UI 9.5 on the Galaxy S25 — before the S26 has even launched. Three internal test builds have been spotted on Samsung’s servers, all tagged for the S25 series: firmware versions S938BXXUDEZKG, S938BOXMDEZKG, and S348BXXUDEZKG. These are not public beta builds. They’re internal, unannounced, and running on last year’s flagship, not the upcoming S26.

That breaks Samsung’s usual pattern: historically, major One UI betas debut first on the newest model, then trickle down months later. This time, the S25 is in the lab alongside the S26. Or possibly ahead of it. The Android Authority report cites SamMobile staffer Fahad Ali Jawed, who notes there’s no evidence in these builds of the newer bootloader (v6) rumored for the S26, suggesting this isn’t a leaked S26 build mislabelled as S25.

It’s genuinely S25 hardware running early One UI 9.5 code. What’s in it? Early glimpses point to a redesigned Samsung Calendar app, expanded Bixby functionality, and refinements to the Phone app. No full feature list exists.

No timeline is confirmed. Jawed speculates the S26 beta could arrive “as early as next week”, but that’s unverified. And the stable release? Expected with the Galaxy S27 launch in early 2027.

Not before. So S25 owners won’t get it tomorrow. But they are now part of the test loop, quietly, internally, and earlier than any recent precedent. The S26 may still get priority when the public beta opens.

But the S25 is already in the room. Beta sign-ups haven’t opened anywhere. No rollout date has been announced. Samsung hasn’t commented.

TopicsOne UIgalaxy-s25samsungbetasoftware-updategalaxy-s26

Reported from

How this story was made

Written by the Hitechreports desk from the reporting credited above, with facts attributed to their original publishers. We do not test devices ourselves; anything about performance, battery life or cameras comes from the outlets that did. Prices are as reported at the time of writing. Editorial policy · Report an error

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Filed by The Mobile Desk

Phones from leak to launch to price cut: what was announced, what it costs where, and when it goes on sale. Indian launches and prices included, not appended.

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