Samsung has quietly started testing One UI 8 on its Galaxy Fold7. The test build F966NKSU1AYF1 is based on Android 16. It appeared on Samsung’s internal server in June 2025. The test build has appeared on Samsung’s internal servers, though access remains limited to South Korea for now.
New One UI 8 Test Build for Galaxy Fold7
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Tarun Vats on X confirmed the test build for Galaxy Fold7 (SM-F966N). The build number is F966NKSU1AYF1. This tag shows Samsung is readying Android 16 features for its foldable phone.
The firmware appeared on Samsung’s KOO server, which specifically handles South Korean testing phases. This regional limitation means only Samsung engineers and select testers in South Korea can currently access the update through built-in installation tools. No public links have been made available.
What’s Coming with One UI 8
According to reports from various reliable sources, One UI 8 will introduce enhanced AI tools and improved multitasking capabilities specifically designed for Samsung’s foldable devices. The update promises a refreshed visual design alongside these functional improvements.
The timing aligns with Samsung’s broader testing strategy. While the company has already launched public beta programs for the Galaxy S25 series in select regions, the Fold7’s testing phase appears to be in its earlier stages.
The test build carries the complete identifier F966NKSU1AYF1 / F966NOKR1AYF1 / F966NKSU1AYF1, following Samsung’s three-segment labelling system that helps engineers track regional and server-specific details. The firmware size and security patch level haven’t been disclosed in the current build logs.
This major Android update represents significant internal testing work, focusing particularly on AI enhancements and multitasking refinements that take advantage of the Fold7’s unique dual-screen design.
Beta Rollout Timeline
Samsung typically follows a structured approach to firmware rollouts. The current internal testing phase will likely be followed by a wider beta program, with initial availability expected in major markets like the United States, United Kingdom, and before expanding to additional countries.
A public beta for Galaxy S25 series is already live in some regions. The Fold7 beta should follow soon. When the larger beta starts, s in the US, UK, and will get access first. Then it will roll out to more countries.
