Overview
Samsung’s latest user‑interface update, One UI 8.5 (based on Android 16 QPR2), is currently being beta‑tested across a wide range of devices. A firmware file (M558BXXU2DZA7) for the Galaxy M55s has been discovered on Samsung’s server, confirming that the mid‑range phone is now part of the testing pool.
What Is One UI 8.5?
One UI 8.5 is the follow‑up to One UI 8.0 and brings a more refined, customizable experience. Built on Android 16 QPR2, it adds visual polish, new gestures, and several productivity‑focused enhancements.
Testing Process
The update is first rolled out to internal testers and then to a broader beta group. Samsung is currently beta‑testing One UI 8.5 on the Galaxy S25 series, with plans to expand to the S26 series and other flagship and mid‑range devices.
Expected Rollout
After successful beta testing, Samsung will launch One UI 8.5 on the Galaxy S26 series and subsequently push it to eligible devices, including the Galaxy M55s. Users can expect the update to appear in the Settings → Software update section once the rollout reaches their region.
New Features Over One UI 8.0
- Enhanced customization options for quick settings and home screen widgets.
- Improved multitasking with split‑screen and pop‑up view refinements.
- New privacy controls and permission dashboards.
- Optimised battery management and adaptive power saving.
- Updated visual design with smoother animations and refreshed iconography.
How to Check for the Update
1. Open Settings on your Galaxy M55s.
2. Navigate to Software update.
3. Tap Check for updates. If the One UI 8.5 build is available for your device, it will be listed for download.