Shimul Sood / Android Authority
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TL;DR
- The first One UI 9.5 beta build for the Galaxy S26 Ultra has been on a test server.
- The build number is S948BXXU6ZZK3/S948BOXM6ZZK3/S948BXXU6CZK3.
- Samsung has updated the bootloader version from U5 to U6.
As Samsung finishes out the rollout of One UI 9, the start of the One UI 9.5 beta program seems closer than ever. Back in August, Samsung appeared to be testing the next major update for the Galaxy S27 Ultra. A beta build for the update has now been spotted for the Galaxy S26 family.
According to tipster @Kailash0729, the first beta build of One UI 9.5 for the Galaxy S26 Ultra has appeared on the test server. This build is said to carry the firmware version S948BXXU6ZZK3/S948BOXM6ZZK3/S948BXXU6CZK3. Additionally, the tipster says that Samsung has updated the bootloader from U5 to U6.
Considering that Samsung has started testing One UI 9.5 for the Galaxy S26 Ultra, it may not be much longer before the tech giant rolls out the One UI 9.5 beta program. There’s hope that Samsung could start the program by the end of November or early December.
The stable version of One UI 9.5 is expected to debut on the Galaxy S27 series. Samsung typically launches the latest iterations of the Galaxy S series near the beginning of the year. It’s unknown exactly when the company will announce its flagship phones, but rumors suggest the Galaxy S27 series is on schedule to launch in January.
