Last updated: September 1st, 2026 at 11:10 UTC+02:00


New Ultra-exclusive Galaxy S26 One UI 9 beta update released

It appears to be a hotfix update to solve a critical bug.

Asif Iqbal Shaik

Reading time: 1 minutes

One UI 9 (Android 17) on a Galaxy S26

Abhijeet Mishra / SamMobile

Firmware

One UI 9 (Android 17) on a Galaxy S26

TL;DR

  • Samsung has released a new One UI 9 beta update for the Galaxy S26 Ultra only, not for the S26 or S26+.
  • The update is firmware S948NKSU4ZZHM, about 512MB, and focuses on stability improvements.
  • It appears to be a hotfix, and Samsung has not said whether it will reach other beta markets.

Just after releasing the first One UI 9.0 beta update for the Galaxy S25 series, Samsung has released yet another One UI 9 beta update for the Galaxy S26 Ultra. Yes, this update is available only for the Galaxy S26 Ultra and not for the Galaxy S26 and the Galaxy S26+.

This new update comes bearing firmware version S948NKSU4ZZHM and has a download size of around 512MB (via @tarunvats33). It brings stability related improvements to the phone.

The official changelog for this update only mentions the following:

  • Stability-related code for device operation has been applied.

Since it is a hotfix update, it may not classify as the One UI 9.0 Beta 8 update. Moreover, it isn't clear if this update will be released in other countries where the beta program is currently open.