The Wait Is Over: Samsung Galaxy S25 Ultra Gets One UI 8.5 — The Complete Guide to Every New Feature, What's Exclusive, and How to Update

After ten beta builds, five months of testing, and more anticipation than any Samsung software update in recent memory, the moment Galaxy S25 Ultra owners have been waiting for has finally arrived. On May 6, 2026, Samsung began rolling out the stable One UI 8.5 update to the Galaxy S25 series — and the S25 Ultra is first in line to receive it. Here is everything you need to know.

The Rollout: Timeline and Global Availability

The stable One UI 8.5 update started rolling out on May 6, 2026 to eligible Galaxy devices, first arriving in South Korea. The Galaxy S25, Galaxy S25+, Galaxy S25 Ultra, and Galaxy S25 Edge received it first. 

The update will then reach Europe, Hong Kong, India, Latin America, North America, Southeast Asia, and Taiwan, with other regions following thereafter. 

This was a remarkably long beta program that saw ten beta builds over five months since December 2025 — a deviation from Samsung's typical two-to-three-month cycle, highlighting the complexity and scale of the One UI 8.5 update. 

For those outside South Korea, the global rollout begins from May 11, 2026, spreading across major markets including Europe, India, North America, Southeast Asia, and more. Samsung is pushing a tight, aggressive rollout window. 

If you are on One UI 8.5 Beta, your device may have received an incremental update switching the Beta state to Stable. If you have not joined the Beta Programme, Samsung is giving you a full firmware build in gigabytes that replaces One UI 8.0 with One UI 8.5, based on Android 16. 

To check for the update manually, go to Settings → Software Update → Download and Install.

What Makes One UI 8.5 Such a Big Deal for the S25 Ultra?

The significance of this update goes beyond routine improvements. The stable One UI 8.5 release for the Galaxy S25 comes with Galaxy AI features launched with the Galaxy S26 series, such as Call Screening, Agentic AI, Creative Studio, an improved Audio Eraser, and a smarter Bixby. In effect, the S25 Ultra is getting several features that were, until very recently, exclusive to Samsung's newest flagship. 

Most of the new AI features in One UI 8.5 were exclusive to the Galaxy S26 series at launch. With this update, they now support the Galaxy S25, S24, and older devices. 

Feature 1: Agentic AI — Your Phone Takes Action for You

One of the headline AI additions is the debut of Agentic AI on the S25 Ultra. Agentic AI is one of the Galaxy AI features that was previously launched with the Galaxy S26 series and is now coming to the S25 Ultra with One UI 8.5. Agentic AI goes beyond answering questions — it can take multi-step actions on your behalf across apps, browsing the web, setting reminders, and completing tasks with minimal input from you. 

Feature 2: Call Screening — Bixby Answers So You Don't Have To

When an unknown number calls you, Bixby can pick up the call on your behalf, ask the caller who they are and why they are calling, and show you a live transcript on screen. You decide whether to join the call or ignore it. You can set it to screen unknown numbers automatically and review the transcript later. To turn it on: Phone app → Settings → Call Screening. 

This feature is particularly powerful for filtering spam calls and scammers — a persistent concern for smartphone users globally.

Feature 3: Photo Assist with Text Prompts — Edit Images Just by Describing What You Want

The Galaxy S25 already came with Photo Assist, but this was much more limited than what arrives with One UI 8.5. With the original Photo Assist, you could circle or select any object in a picture to remove it from the photo entirely, resize it, or move it around. 

Image editing has never been easier with One UI 8.5 — just describe how you want your image to change, and Galaxy AI handles the rest. Want to change the colour of someone's jacket, add a sunset to the background, or remove a stranger from your holiday photo? Simply type it in. 

Feature 4: Real-Time Audio Eraser — System-Wide Background Noise Removal

Audio Eraser has been enhanced in One UI 8.5. It now functions system-wide and in real-time. This means users can block background noise through many built-in programmes, as well as streaming platforms and social media apps. Previously, Audio Eraser only worked on videos already saved in the gallery. Now it works live, across the entire system. 

Feature 5: Creative Studio — AI-Powered Creative Tools

Creative Studio is now more accessible from the Apps screen, empowering users to create custom wallpapers, stickers, and profile images with ease. This suite of generative AI creative tools allows users to design original visual content directly on their device without needing any third-party apps. 

Feature 6: AirDrop Support Over Quick Share — Android Meets Apple

Perhaps the most practically transformative feature in the entire update — especially for users who live in mixed iPhone/Android households or workplaces.

One UI 8.5 brings AirDrop support improvements, including additional upgrades to Quick Share, such as the ability to identify people in photos and suggest sending them to the subjects. The ability to share files directly with iPhone, iPad, and Mac users via Quick Share removes one of the longest-standing friction points between the two ecosystems. 

Feature 7: Ambient Design — A Fresh New Look

One UI seamlessly integrates into your daily routine by combining immersive visuals with meaningful personalisation for a more refined and sophisticated design. Transparent blur effects add depth and make content easier to navigate, while floating elements react organically to your workflow for a more focused experience. Through familiar and intuitive data visualisation, One UI delivers a design that feels both personal and relatable, helping you focus on what matters. 

What the S25 Ultra Is NOT Getting: The Honest Truth

One UI 8.5 is not a complete equaliser between the S25 Ultra and S26 Ultra. Some Galaxy S26 features remain hardware-exclusive and will not be coming to the S25 series regardless of software updates.

The most impressive Galaxy S26 features remain exclusive to the latest flagships, including the Now Nudge, the 24-megapixel camera mode, and AI-powered notification handlers. These are not available on the Galaxy S25 Ultra via One UI 8.5.

These omissions matter for the most demanding power users, but for the vast majority of S25 Ultra owners, the features being delivered still represent a meaningful and significant upgrade.

The Road Behind: 10 Betas and Why It Took So Long

Samsung officially released the stable One UI 8.5 update for the Galaxy S25 series after 10 beta releases, ending the long wait for this feature-packed update. The extended beta cycle was necessary to ensure stability across the wide range of S25 variants and carrier configurations. Early beta builds were plagued with battery drain issues, camera glitches, and connectivity bugs — all of which Samsung worked through methodically before signing off on the stable release. 

Full Device Rollout Schedule

The Galaxy S25 series — including the standard, Edge, Ultra, and FE models — are first in line. Next up are the Galaxy S24 series, Galaxy S24 FE, Z Fold 6, Z Flip 6, and tablets such as the Galaxy Tab S11 and Tab S10 series. Samsung Galaxy S23, Z Fold 5, Z Flip 5 and select A-series devices will follow in a subsequent wave. Galaxy A, F, and M series devices from the last three generations will receive the update, but their AI features will be under the "Awesome Intelligence" label rather than the full Galaxy AI branding. 

Devices that will not receive One UI 8.5 include the Galaxy S21 series (non-FE), Galaxy Note 20 series, and older Galaxy A, M, and F devices released before 2023, as these did not receive One UI 8.0 and have not been included in the One UI 8.5 programme. 

What Comes After One UI 8.5?

Samsung is already looking ahead. Now that One UI 8.5 is available for the S25, Samsung will soon drop the One UI 9 Beta, with Galaxy S26 users first in line for priority treatment. Galaxy S25 series devices may also join the next Beta programme after spending a few months on One UI 8.5. 

The Bottom Line: Is One UI 8.5 Worth Installing on Your Galaxy S25 Ultra?

Absolutely — and without hesitation. One UI 8.5 transforms the S25 Ultra from a world-class flagship into something even more capable. The combination of Agentic AI, real-time Call Screening, text-prompt image editing, system-wide Audio Eraser, AirDrop-compatible Quick Share, and a completely redesigned visual interface represents the single biggest software upgrade the S25 Ultra has received since launch. The 10-beta journey was long, but the result is a stable, feature-rich update that delivers exceptional value to existing owners. If you have not yet received the update notification, check Settings → Software Update today.

Sources:

1. Android Authority (Stable Release) — https://www.androidauthority.com/samsung-galaxy-s25-one-ui-8-5-stable-rollout-3661337/
2. SamMobile (Official Rollout) — https://www.sammobile.com/news/official-one-ui-8-5-rollout-has-started/
3. Android Central (Device List) — https://www.androidcentral.com/phones/samsung-galaxy/samsungs-stable-one-ui-8-5-update-officially-lands-on-older-galaxy-phones
4. Samsung Global Newsroom — https://news.samsung.com/global/samsungs-one-ui-8-5-official-rollout-starts-may-6
5. Sammy Fans (Stable Release) — https://www.sammyfans.com/2026/05/06/samsung-releases-stable-one-ui-8-5-update/
6. Sammy Fans (Missing Features) — https://www.sammyfans.com/2026/05/08/official-one-ui-8-5-leaves-key-s26-features-missing/
7. BGR (5 Biggest Features) — https://www.bgr.com/2166552/samsung-galaxy-one-ui-8-5-new-features/
8. TechRadar (Device Compatibility) — https://www.techradar.com/phones/samsung-galaxy-phones/samsung-finally-rolls-out-one-ui-8-5-to-the-galaxy-25-s24-and-more-heres-the-full-list-of-compatible-devices
9. TechCabal (Features Explained) — https://techcabal.com/2026/05/07/samsung-one-ui-8-5-update-features-eligible-phones/
10. QuantoSei News (Global Rollout) — https://news.quantosei.com/2026/05/07/samsungs-stable-one-ui-8-5-update-officially-lands-on-older-galaxy-phones/
11. Sammy Fans (Rollout Schedule May 2026) — https://www.sammyfans.com/2026/05/06/samsung-software-roadmap-may-2026/
12. Notebookcheck (40+ Devices) — https://www.notebookcheck.net/Samsung-rolls-out-One-UI-8-5-to-over-40-Galaxy-smartphones-and-tablets.1290755.0.html