Samsung Galaxy M55s One UI 8.5 Update: Android 16 QPR2 Testing Revealed

Samsung has officially taken the next step in its software evolution by launching the latest version of its custom skin, One UI 8.5, based on the highly anticipated Android 16 QPR2. While the tech giant is currently focusing its beta testing efforts on the flagship Galaxy S25 series, the rollout strategy is already expanding. Once the initial testing phase concludes successfully, this sophisticated software will make its grand debut with the Galaxy S26 series before reaching a wider range of eligible Samsung Galaxy smartphones and tablets.

Expanding the One UI 8.5 Ecosystem to the M-Series

Samsung's commitment to software longevity is evident as it tests One UI 8.5 across a diverse portfolio. This includes the premium Galaxy S and Galaxy Z series, the popular Galaxy A series, and now, the mid-range Galaxy M series. The addition of the Galaxy M55s to this testing list confirms that Samsung is prioritizing a fast-track update cycle for its most recent mid-range contenders.

Evidence of this progress appeared recently on Samsung’s internal servers, where a specific firmware build for the Galaxy M55s was identified. The build, identified by version number M558BXXU2DZA7, indicates that developers are actively refining the Android 16 experience for this hardware. This discovery brings Galaxy M55s owners one significant step closer to the official public release.

What’s New in the One UI 8.5 Experience?

Compared to the previous One UI 8.0, the 8.5 iteration introduces a far more sophisticated aesthetic. The user interface has been streamlined for better ergonomics, making it easier to navigate with one hand while offering deeper layers of personalization. Samsung has focused on "convenience-first" features, ensuring that the transition to Android 16 feels like a major leap forward rather than a minor tweak.

To provide a clearer picture of these upgrades, a detailed video guide has been released showcasing the visual changes, animation improvements, and the new functional widgets that define this version. You can explore the full breakdown of the software in the embedded player below.

What is the base operating system for One UI 8.5?

One UI 8.5 is built upon Android 16 QPR2, which represents the second Quarterly Platform Release of the Android 16 operating system, offering improved performance and new core features.

Has the Galaxy M55s update been officially released?

Currently, the update is in the internal testing phase on Samsung’s servers. The discovery of firmware M558BXXU2DZA7 suggests it is in active development but not yet available for public download.

What are the main visual changes in One UI 8.5?

The interface is designed to be more sophisticated and customizable. It features smoother animations, refined icons, and enhanced layout options that make the system easier to use compared to One UI 8.0.

When will the Galaxy M55s receive the stable update?

Typically, Samsung rolls out these updates to mid-range devices shortly after the flagship Galaxy S26 series makes its debut. This puts the expected release window in the months following the flagship launch.

🔎 In conclusion, the appearance of One UI 8.5 firmware for the Galaxy M55s is a promising sign for Samsung users who value timely software support. By bridging the gap between flagship innovations and mid-range hardware, Samsung continues to solidify its position as a leader in mobile software delivery. Stay tuned for more updates as this firmware moves from internal testing to a global rollout.