After several rounds of beta testing firmware, the Galaxy S25 Ultra has finally been spotted running stable One UI 8.5 firmware. The latest build number S938BXXU9CZDH spotted in the Checkfirm database reveals that Samsung is now testing the stable One UI 8.5 update for the Galaxy S25 Ultra. Samsung recently released the 10th beta version in major countries, and rumors claimed it would be the last beta firmware, with the next release expected to be the stable version.
Galaxy S25 Ultra One UI 8.5 Release Date
Now, according to the firmware code in the Checkfirm database, this seems confirmed, so we can assume that a stable rollout could happen by the end of this month. The rumored date for the stable rollout is April 30 in South Korea and May 4 in other major countries. A Samsung support center representative has also mentioned the same date, though their information is not always accurate, so we still need a concrete confirmation.

One UI 8.5 Features for Galaxy S25 Series
In the recent Beta 10 version, Samsung showcased what users can expect in the stable release. It will bring a couple of new Galaxy AI features like Call Screening, Creative Studio, Photo Assist, and more to the devices. Samsung has also added support for sharing with Apple devices, so users can share files with family members or friends who use iPhones.
Users can also expect a fresh look, updated design, new settings, and other minor tweaks in the stable One UI 8.5 version.
One UI 8.5 Update Timeline
There is no official information regarding the One UI 8.5 timeline. Famous tipsters like Tarun Vats and Alpha Turk are betting on May 4 for the international rollout. According to the tipsters, many major countries will receive the major firmware rollout on May 4, including India, Germany, the United Kingdom, and several other European countries.















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