Samsung is shifting into high gear with preparations for One UI 8.5, the next major software leap for the Galaxy ecosystem. Fresh data reveals that internal testing has officially expanded to include several mid-range smartphones and tablets, specifically the Galaxy A34, M16, Tab A9, and Tab A11+.

On the smartphone front, the Galaxy A34 has been spotted on Samsung’s test servers in South Korea sporting a One UI 8.5 build (firmware version A346NKSUCFZA1). This confirms the device is actively being put through its paces. It follows closely on the heels of the Galaxy A54, signaling that Samsung is broadening the scope of its testing across its popular mid-range lineup. However, as is standard practice, a spot on the test server doesn't guarantee an immediate public rollout.

The Galaxy M series isn't being left behind, either. The Galaxy M16 has also kicked off its One UI 8.5 testing phase, appearing on Korean servers with firmware M166SKSU4CZA6. This indicates a parallel development track to ensure the budget-friendly M series stays up to date.

In the tablet arena, both the Galaxy Tab A9 and Tab A11+ have entered the fray. The Tab A9, which originally launched with Android 13 and was later bumped to the Android 16-based One UI 8, is now running One UI 8.5 builds on servers across India, Europe, and Turkey. The Wi-Fi variant was surfaced with firmware X110XXU7DZA1. Notably, this will likely be the final major feature update for this particular model.

Meanwhile, the Galaxy Tab A11+, which shipped with One UI 8 right out of the box, has been quickly fast-tracked for the 8.5 upgrade. Bearing firmware version X230XXU2BZA1, test builds have popped up in multiple regions—including India, Europe, Korea, and Turkey—suggesting a widespread rollout plan is in the works.

One UI 8.5 is expected to focus heavily on refinement and optimization rather than just new features. The update is slated to debut alongside the Galaxy S26 series in the near future. Following that launch, Samsung will begin pushing the update to eligible devices, with the roadmap likely wrapping up around early June. If you're rocking a supported Galaxy device, keep an eye out—test builds are starting to proliferate, meaning the update is getting closer to reality.