Samsung started a rollout of a UI 8 stable update earlier this week, but it has been working on a UI 8.5 for the Galaxy S26 series for the past few months. A UI 8.5 firmware for Galaxy S25 Ultra was also recently spotted on Samsung’s server, and now we hear that a UI 8.5 firmware that consists of Round Nine Rounds that confirms a UI 9.0 will be the next main version of the UI.
A UI 8.5 firmware confirms a UI 9 as the next main version of a UI 9
While an UI 8 and under-development are based on one UI 8.5 Android 16, a UI 9.0 will be based on potential Android 17. And we know that it is too early to say anything about the rollout of a UI 9.0, it will debut with next year’s Galaxy Z Fold and Galaxy Z Folding Smartphy NS.

Samsung Galaxy Z Fold 7 debuted with a UI 8
When we are waiting for more details about a UI 9.0, you can proceed this way for the official One UI 8 stable rollout schedule shared by Samsung. But note that it does not apply to all regions.
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