Samsung Galaxy S25 Ultra Review AI Powered Innovations Specs and Accessories

The Samsung Galaxy S25 Ultra is Samsung's premium big-screen flagship, combining a 6.9-inch QHD+ AMOLED display, Snapdragon 8 Elite for Galaxy performance, a 200MP main camera, two telephoto cameras, Galaxy AI and an integrated S Pen.

But specifications alone do not answer the question most buyers have: is the Samsung Galaxy S25 Ultra actually worth buying?

For buyers upgrading from an older Galaxy phone, the S25 Ultra offers a compelling combination of performance, cameras, display quality and productivity features. The decision is harder for Galaxy S24 Ultra owners because several core features remain familiar.

Quick answer: the Galaxy S25 Ultra is an excellent choice if you want Samsung's most complete flagship experience. However, S24 Ultra owners should upgrade only if improvements such as the 50MP ultrawide camera, newer processor and refined design genuinely matter to them.

This Samsung Galaxy S25 Ultra review looks at the camera, battery, display, performance, Galaxy AI, S Pen, gaming and S24 Ultra comparison to help UK buyers decide whether it is the right phone for them.

Samsung Galaxy S25 Ultra: Quick Verdict

Pros

• Excellent 6.9-inch QHD+ Dynamic AMOLED 2X display

• Snapdragon 8 Elite for Galaxy performance

• Versatile four-camera rear system

• Upgraded 50MP ultrawide camera

• Dedicated 3x and 5x optical zoom

• Integrated S Pen

• 5,000mAh battery

• Galaxy AI and productivity features

• Gorilla Armor 2 and titanium construction

• IP68 water and dust resistance

Cons

• Large size will not suit everyone

• Premium flagship pricing

• Several S24 Ultra features remain similar

• Battery capacity remains 5,000mAh

• S Pen loses Bluetooth remote functionality

• No built-in magnetic Qi2-style alignment

Samsung Galaxy S25 Ultra vs S24 Ultra

This is one of the most important comparisons for anyone considering the S25 Ultra.

Should You Upgrade From the Galaxy S24 Ultra?

For most satisfied S24 Ultra owners, I would not upgrade simply because the S25 Ultra is newer.

The S25 Ultra brings a newer processor, a much higher-resolution ultrawide camera and design refinements. However, the S24 Ultra already provides a 200MP main camera, dedicated telephoto cameras, a 5,000mAh battery, S Pen support and a premium display.

Upgrade if a specific improvement solves something you dislike about your current phone.

For example, photographers may place more value on the upgraded ultrawide camera, while demanding users may benefit from the newer Snapdragon platform.

If your S24 Ultra already does everything you need, keeping it may provide better value.

For S23 Ultra owners and users of older Galaxy devices, the accumulated improvements across multiple generations make the S25 Ultra easier to justify.

Samsung Galaxy S25 Ultra Key Specifications

Design and Build Quality

Samsung has refined the Ultra design rather than completely reinventing it.

The Galaxy S25 Ultra measures 162.8 × 77.6 × 8.2mm and weighs 218g. It uses a titanium frame, while the front is protected by Corning Gorilla Armor 2.

Samsung also specifies IP68 water and dust resistance.

The more rounded shape makes the S25 Ultra visually closer to the rest of the Galaxy S family, while still retaining the large-screen Ultra identity.

Size is the main practical consideration.

A 6.9-inch phone provides substantial screen space for streaming, gaming, reading, editing, multitasking and S Pen work. The trade-off is that it will never feel like a compact handset.

If you want a large display, that is part of the appeal. If comfortable one-handed use matters more, a smaller Galaxy model may suit you better.

Display: Is the Galaxy S25 Ultra Screen Any Good?

The display remains one of the strongest reasons to consider Samsung's Ultra.

The S25 Ultra uses a 6.9-inch Dynamic AMOLED 2X display with a 3120 × 1440 QHD+ resolution and refresh rate of up to 120Hz.

That combination is particularly useful for:

• streaming films and television;

• gaming;

• reading;

• photo viewing and editing;

• split-screen multitasking;

• handwriting with the S Pen;

• and productivity apps.

The adaptive high refresh rate allows compatible content and interface movement to appear smoother than on a conventional 60Hz display.

Gorilla Armor 2 also adds another premium element to the screen package.

For someone moving from an older or mid-range smartphone, the display is likely to be one of the most immediately noticeable upgrades.

Performance: How Fast Is the Galaxy S25 Ultra?

The Galaxy S25 Ultra uses the Snapdragon 8 Elite for Galaxy, paired with 12GB RAM.

This is flagship hardware intended for demanding workloads rather than basic smartphone use alone.

Performance Scorecard

Independent reviewers have recorded excellent CPU and graphics performance from the S25 Ultra, although exact benchmark numbers vary according to software version, device temperature and testing methodology.

For that reason, a single Geekbench or graphics-test score should not be treated as a permanent device specification.

The practical takeaway is simpler: performance is unlikely to be the reason most buyers outgrow the S25 Ultra.

Is the Samsung Galaxy S25 Ultra Good for Gaming?

Yes.

The Snapdragon 8 Elite for Galaxy, 12GB RAM and 120Hz AMOLED display give the S25 Ultra strong foundations for demanding mobile gaming.

The large screen also provides more room for games with detailed graphics and complex on-screen controls.

However, this is not a dedicated gaming phone.

Its advantage is that it combines gaming performance with premium cameras, an S Pen, productivity tools and mainstream flagship features.

If gaming is your only priority, specialist gaming phones may offer more dedicated features. If you want powerful gaming alongside photography and everyday flagship use, the S25 Ultra is a stronger all-rounder.

Samsung Galaxy S25 Ultra Camera Review

Camera flexibility is one of the S25 Ultra's biggest strengths.

Rather than relying on one camera and digital cropping for everything, the S25 Ultra gives photographers several genuinely useful focal lengths.

200MP Main Camera

The 200MP main camera handles the core photography workload.

High resolution provides substantial image information for processing and cropping, but megapixels alone do not determine whether a photograph looks good.

Exposure, HDR, colour processing, stabilisation, focusing and available light all matter.

The real strength is that the main camera works as part of a broader camera system rather than trying to cover every situation alone.

50MP Ultrawide Camera

The 50MP ultrawide is one of the most meaningful hardware changes compared with the S24 Ultra's 12MP ultrawide.

Ultrawide photography is particularly useful for:

• landscapes;

• buildings;

• interiors;

• group photographs;

• travel;

• and situations where you cannot physically step farther back.

For S24 Ultra owners interested mainly in camera improvements, this upgrade deserves more attention than the unchanged 200MP headline resolution of the main camera.

3x and 5x Optical Zoom

The S25 Ultra includes dedicated 3x and 5x optical telephoto cameras.

The 3x option is useful for portraits and moderately distant subjects, while the 5x camera provides extra reach for travel, architecture, events and distant subjects.

Samsung also lists optical-quality 2x and 10x zoom using its Adaptive Pixel approach.

5x Optical vs 10x Optical-Quality Zoom

These terms should not be confused.

5x is a dedicated optical zoom level.

Samsung describes 10x as optical-quality zoom, created using sensor information and image processing.

That does not mean the phone contains a dedicated 10x optical telephoto lens.

Digital zoom can extend considerably farther, but maximum digital-zoom figures should not be treated as equivalent to true optical magnification.

Low-Light Photography

Low-light photography challenges every smartphone because the camera has less light available while still needing to control noise, motion and colour.

Samsung uses its ProVisual Engine and computational photography to process difficult scenes.

However, no phone can make lighting irrelevant. Moving subjects, extreme darkness and aggressive digital zoom can still reduce image quality.

Video and Audio Eraser

Samsung supports high-resolution video recording on the S25 Ultra, including 8K recording at 30fps.

The phone also includes AI-assisted tools such as Audio Eraser, designed to help reduce unwanted sound in compatible video.

That can be useful when recording outdoors, travelling or filming in busy environments where wind, crowds or background noise distract from the subject.

Battery Life: Is 5,000mAh Enough?

The Galaxy S25 Ultra uses a 5,000mAh typical battery.

That is the same headline capacity as the S24 Ultra, so improvements depend more on efficiency and software optimisation than simply fitting a larger battery.

Samsung rates the device for up to 31 hours of video playback under its specified conditions.

That should be treated as a manufacturer estimate rather than a guarantee of everyday battery life.

Actual endurance depends on:

• screen brightness;

• refresh rate;

• mobile signal;

• navigation;

• camera use;

• gaming;

• hotspot use;

• background applications;

• and AI workloads.

Independent reviewers have also reported strong endurance from the S25 Ultra, but results naturally differ according to test methodology.

For buyers, the useful conclusion is that Samsung combines a large battery with a newer flagship processor rather than chasing a larger capacity number alone.

Charging: 45W Wired and Wireless Options

The Galaxy S25 Ultra supports up to 45W wired charging with compatible equipment.

If fast charging matters to you, check both the adapter and cable rather than assuming any high-wattage charger will automatically deliver the phone's maximum supported speed.

Wireless charging and Wireless PowerShare are also supported.

Does the Galaxy S25 Ultra Have Qi2?

This needs qualification.

The S25 Ultra does not provide the built-in magnetic implementation that many buyers associate with magnetic Qi2 accessories.

Magnetic alignment can instead depend on using a compatible case and accessory.

If magnetic wireless charging is important to you, check the exact case and charger combination before buying.

Galaxy AI: Which Features Are Actually Useful?

The term Galaxy AI covers several features, but not every AI tool will matter equally to every buyer.

The better question is whether these features make tasks you already perform easier.

Circle to Search

Circle to Search with Google allows you to search for something visible on your screen without manually leaving the current app and typing a conventional search.

You can select an image, text or object and request related information.

Its usefulness comes from reducing friction in something people already do regularly: searching.

Audio Eraser

Audio Eraser is designed to identify and reduce unwanted sound in compatible video recordings.

For people recording outdoors, travelling, filming events or creating social content, this can be more practically useful than novelty AI effects.

Now Brief

Now Brief is designed to surface personalised information and summaries during the day.

Its value depends on the apps, Samsung services and personalisation features you actually use.

Gemini and AI Assistance

Google's Gemini integration expands contextual and multimodal assistance.

However, I would not recommend buying the S25 Ultra solely because it has AI features.

AI services can change through software updates, account requirements, regional availability and third-party terms.

The stronger argument is that the S25 Ultra combines these tools with already capable flagship hardware.

S Pen: Still a Major Ultra Advantage?

The integrated S Pen remains one of the most distinctive features of the Ultra range.

It can be useful for:

• handwritten notes;

• drawing;

• signing documents;

• annotating screenshots;

• precise selections;

• and detailed navigation.

Keeping the stylus inside the phone also makes it easier to use regularly than carrying a separate accessory.

The Important S Pen Downgrade

There is one significant change existing Ultra owners should understand.

The S25 Ultra's S Pen does not retain the Bluetooth functionality available on the S24 Ultra S Pen.

That means Bluetooth-dependent remote functions are no longer available.

If you mainly use the S Pen for writing, drawing and navigation, this may make little difference.

If remote S Pen controls formed part of your workflow, however, it is a genuine downgrade.

Security and Long-Term Ownership

Modern phones contain payment details, photographs, authentication apps, personal conversations and work information.

Security therefore matters alongside performance and cameras.

Samsung's ecosystem includes Samsung Knox security technologies alongside Android's security architecture.

Long-term ownership should also influence the buying decision.

Premium hardware becomes easier to justify when you intend to keep a device for several years rather than replacing it annually.

That makes performance headroom, security and software support relevant parts of the overall value calculation.

5G and UK Connectivity

The UK Galaxy S25 Ultra supports 5G, along with Wi-Fi, Bluetooth 5.4, NFC and UWB connectivity.

Actual mobile speeds depend on:

• your network;

• tariff;

• local coverage;

• congestion;

• building conditions;

• and signal strength.

A premium 5G phone cannot guarantee maximum data speeds everywhere in the UK.

If network performance matters to you, check current coverage information directly with your intended provider for the places where you actually use your phone.

Which Storage Option Should You Choose?

Samsung offers 256GB, 512GB and 1TB configurations.

For many buyers, 256GB is the sensible starting point.

Choose 512GB if you:

• record a lot of high-resolution video;

• install many large games;

• keep offline films or music;

• maintain a large photo library;

• or plan to keep the phone for several years.

The 1TB version is best suited to genuinely storage-heavy users.

Do not automatically pay for the largest option. Check how much storage your current phone uses and leave sensible room for future apps, photographs and video.

UK Buying Guide & Price Transparency

Once you have decided that the S25 Ultra is right for you, the next question is how to compare buying options properly.

Do not compare offers using price alone.

New vs Refurbished: Which Should You Choose?

Buying new may suit you if you specifically want a brand-new retail device and the associated purchasing experience.

A refurbished device can make more sense when your priority is getting flagship hardware at a lower current purchase price, provided its condition, warranty, unlocked status and seller terms are clearly explained.

The key is transparency.

A refurbished S25 Ultra should not be judged only by how much cheaper it appears. Check exactly what you are receiving and compare the complete offer.

Check the Current Zextons Option

If you have finished researching the phone and are now comparing buying options, you can view the Samsung Galaxy S25 Ultra unlocked refurbished at Zextons.

Check the product page for the current price, available configuration, condition information, warranty details and availability rather than relying on figures quoted in an article, because commercial details can change.

This keeps the buying decision transparent: this review explains whether the S25 Ultra suits you, while the product page provides the current purchasing information.

Galaxy S25 Ultra Accessories: What Do You Actually Need?

You do not need every accessory marketed for an expensive flagship.

Protective Case

For most buyers, a case is the first accessory worth considering.

Choose according to whether you prioritise slimness, grip, appearance or additional drop protection.

Screen Protection

Gorilla Armor 2 provides premium front protection, but some users may still prefer an additional replaceable layer against scratches or accidental damage.

Check fingerprint-sensor compatibility before buying.

Compatible Charger

If you do not already own suitable charging equipment, choose a charger that supports the S25 Ultra's charging requirements.

Do not choose purely by the largest wattage printed on the adapter.

Wireless Charging

Wireless charging can be useful on a desk or bedside table.

If magnetic alignment matters, check compatibility between the phone, case and charger before purchasing accessories.

Who Should Buy the Samsung Galaxy S25 Ultra?

Buyers Upgrading From an Older Galaxy

This is one of the strongest audiences for the S25 Ultra.

Across several generations, improvements in processing, cameras, display technology and software become more meaningful than they appear in a one-generation comparison.

Mobile Photography Enthusiasts

The 200MP main camera, 50MP ultrawide and two optical telephoto cameras provide considerably more framing flexibility than simpler camera systems.

Power Users

The Snapdragon 8 Elite for Galaxy, 12GB RAM, large display and S Pen suit users who regularly push their phones beyond basic messaging and browsing.

S Pen Users

Few mainstream flagship phones include a stylus stored directly inside the device.

For handwriting and precise input, that remains a genuine differentiator.

Buyers Planning Long-Term Ownership

Premium hardware makes more financial sense when you plan to use the phone for several years rather than replacing it annually.

Who Should Skip the Galaxy S25 Ultra?

Happy S24 Ultra Owners

If your S24 Ultra already does everything you need, the S25 Ultra is not an essential upgrade.

Buyers Who Prefer Compact Phones

A 6.9-inch display inevitably creates a large handset.

Light Users

If your daily use consists mainly of messaging, browsing, social media and occasional photographs, you may never use enough of the Ultra's additional capability to justify it.

Buyers Focused Mainly on Price

If value matters more than having Samsung's highest-end hardware, comparing other Galaxy models or previous-generation devices may make more sense.

Final Verdict: Is the Samsung Galaxy S25 Ultra Worth Buying?

Yes — for the right buyer.

The Galaxy S25 Ultra combines a large QHD+ AMOLED display, Snapdragon 8 Elite for Galaxy performance, a versatile four-camera system, Galaxy AI, a 5,000mAh battery and an integrated S Pen.

Its biggest strength is not one headline specification.

It is versatility.

The S25 Ultra can work as a powerful everyday phone, camera, gaming device, media screen, handwriting tool and productivity device without being built exclusively around one of those roles.

For someone upgrading from an older Galaxy and specifically wanting Samsung's complete Ultra experience, the S25 Ultra deserves a place near the top of the shortlist.

For an S24 Ultra owner, the decision requires more thought. The upgraded ultrawide camera and newer processor are meaningful improvements, but battery capacity remains unchanged and the S Pen loses Bluetooth functionality.

That makes the S25 Ultra a better phone without automatically making it a necessary upgrade.

Decide first whether its features justify the upgrade for you. Once that decision is made, compare the current UK buying options using price, storage, condition, warranty and seller terms rather than choosing from the headline price alone.

Frequently Asked Questions

Is the Samsung Galaxy S25 Ultra worth upgrading to from the S24 Ultra?

Not for everyone. The S25 Ultra has a newer processor, upgraded 50MP ultrawide camera and design refinements, but the S24 Ultra remains a highly capable flagship. Upgrade when those specific improvements matter to you rather than simply because the S25 Ultra is newer.

Does the UK Galaxy S25 Ultra use Snapdragon?

Yes. The Galaxy S25 Ultra uses the Snapdragon 8 Elite for Galaxy platform, including the UK model.

Is the Samsung Galaxy S25 Ultra good for photography?

Its camera system is highly versatile. The 200MP main camera, 50MP ultrawide, 50MP 5x telephoto and 10MP 3x telephoto provide several useful focal lengths for different types of photography.

Is the Galaxy S25 Ultra good for gaming?

Yes. The Snapdragon 8 Elite for Galaxy, 12GB RAM and 120Hz AMOLED display make it well suited to demanding mobile gaming. Dedicated gaming phones may offer more specialist features, but the S25 Ultra provides a broader flagship experience.

Should I upgrade from an S23 Ultra to the S25 Ultra?

The upgrade is easier to justify than moving from an S24 Ultra because improvements have accumulated across more than one generation. However, consider which changes actually improve how you use your phone before replacing a device that still works well.