Samsung has officially started rolling out the One UI 8 stable update, based on Android 16, for its flagship Galaxy S25 series in the United States. After debuting earlier this month in South Korea and quickly reaching markets such as India, Germany, and the UK, the update is now finally arriving for US users. Reports also confirm that other regions including the Middle East and Indonesia have begun receiving the same rollout.
The new firmware carries version numbers S93xUSQU5BY13/S93xUOYN5BY13/S93xUSQU5BY13 and includes the September 2025 Android security patch. 
The package is hefty – over 3.8GB for users upgrading from One UI 7 – which underlines just how much Samsung has packed into this release. While some users claim that the interface and features feel very familiar, others have noticed smoother animations and a slightly faster overall performance. However, one recurring remark is that the bootloader remains locked, limiting modification options for power users.
If you own a Galaxy S25, S25+, or S25 Ultra in the US and haven’t yet received the update notification, you can check manually by heading to Settings > Software update. Samsung has also shared an official rollout schedule for eligible devices, though the timeline may vary depending on your specific carrier or region.
In practical use, early adopters report the update runs stable with no major bugs so far. Many highlight smoother multitasking and better system responsiveness. While the jump may not introduce radical UI redesigns, the refinement is appreciated. With security enhancements, optimizations, and extended availability across multiple countries, One UI 8 represents another step in Samsung’s effort to keep its flagship line polished and competitive.
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already reached middle east too, got mine last night