Samsung has started rolling out One UI 9 Beta 4 for the Galaxy S26 Ultra, bringing another round of refinements ahead of the stable Android 17 release. While this isn’t a feature-packed update, it delivers a long list of bug fixes, interface improvements and performance optimizations designed to make the beta experience more stable.
The latest beta arrives with firmware version ZZG4, weighs around 1.25GB, and also includes the July 2026 Android Security Patch, ensuring users remain protected while testing Samsung’s newest software.
If you’re already enrolled in the One UI 9 Beta Program, this update is worth installing as it addresses several issues reported in previous beta builds.
One UI 9 Beta 4 Update Details
Samsung’s latest beta update includes the following:
- Firmware Version: ZZG4
- Android Version: Android 17
- One UI Version: One UI 9 Beta 4
- Update Size: Approximately 1.25GB
- Security Patch: July 2026
The relatively large download size suggests Samsung has bundled numerous fixes and system optimizations rather than just a monthly security update.
What’s New in One UI 9 Beta 4?
Samsung continues polishing One UI 9 as it prepares for the stable rollout. Beta 4 focuses primarily on improving reliability, responsiveness and overall user experience.
Major improvements include:
UI Optimizations
Samsung has refined various interface animations throughout One UI 9. Users should notice:
- Smoother transitions
- Improved animation consistency
- Better scrolling performance
- Enhanced visual stability
These changes make everyday interactions feel more fluid across the system.
Quick Panel Improvements
The Quick Panel receives additional refinements that improve usability.
Expected improvements include:
- Faster panel opening animation
- Improved tile responsiveness
- Better layout consistency
- More reliable brightness controls
- Reduced animation glitches
Samsung has been actively refining the redesigned Quick Panel throughout the beta cycle based on user feedback.
Gaming Performance Fixes
Gaming optimizations are another focus of Beta 4.
Samsung has addressed several issues affecting gameplay, including:
- Better frame stability
- Reduced stuttering
- Improved Game Booster behavior
- Better thermal optimization
- More consistent touch responsiveness
These changes should benefit users who regularly play demanding mobile games.
Live Notifications Improvements
Samsung continues refining its new Live Notifications experience introduced with One UI 9.
Beta 4 reportedly improves:
- Notification reliability
- Real-time updates
- Animation smoothness
- Better synchronization
- Improved responsiveness
These enhancements make Live Notifications feel more polished and dependable during everyday use.
Bug Fixes Across the System
As expected from a late-stage beta update, Samsung has fixed numerous issues reported by testers.
Areas receiving improvements include:
- System stability
- Camera reliability
- Battery optimization
- App compatibility
- Lock screen behavior
- Home screen responsiveness
- Settings app stability
- Background process management
Although Samsung hasn’t published every individual fix, Beta 4 appears to be one of the most stability-focused releases so far.
July 2026 Security Patch Included
Besides feature refinements, the update also integrates the July 2026 Android Security Patch.
This patch addresses the latest Android and Samsung security vulnerabilities, helping protect Galaxy S26 Ultra users while they continue testing One UI 9.
Keeping security updates current during beta testing is an important part of Samsung’s software program.
Stable Release Getting Closer
The arrival of Beta 4 suggests Samsung is entering the final stages of One UI 9 development for the Galaxy S26 Ultra.
Typically, later beta builds concentrate on:
- Eliminating remaining bugs
- Improving performance
- Optimizing battery life
- Enhancing system stability
- Final compatibility testing
If no major issues are discovered, Samsung could move toward a Release Candidate build before beginning the public stable rollout.
How to Install One UI 9 Beta 4
If you’re already enrolled in Samsung’s beta program:
- Open Settings
- Go to Software Update
- Tap Download and Install
- Install the 1.25GB update
- Restart your device after installation
As always, it’s recommended to back up important data before installing beta software.
Should You Install Beta 4?
For existing beta testers, the answer is yes.
The update focuses on polishing the software rather than introducing experimental features, making it a valuable upgrade for anyone already running earlier One UI 9 beta builds.
Users should notice:
- Better overall stability
- Improved system responsiveness
- Fewer bugs
- Smoother animations
- Better gaming experience
- Enhanced notification behavior
Final Thoughts
Samsung’s One UI 9 Beta 4 for the Galaxy S26 Ultra is another important milestone on the road to the stable Android 17 release. Although it doesn’t introduce headline-grabbing new features, the update delivers meaningful improvements where they matter most—system stability, UI responsiveness, Quick Panel usability, gaming performance, Live Notifications and overall reliability.
With the July 2026 Security Patch included and a wide range of bug fixes, Beta 4 offers one of the most polished One UI 9 experiences yet. If Samsung continues at this pace, the stable release may not be far away.
For more Samsung One UI 9 news, leaks, eligible device lists, and feature coverage, check out NokiaPowerUser’s dedicated coverage here.
You can also read NokiaPowerUser’s detailed look at the latest One UI 9 interface improvements, smoother animations, and new blur effects here.
