Phones / Compare

Samsung Galaxy S25 Ultra vs Xiaomi 15

A

Product A: Samsung

Galaxy S25 Ultra

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B

Product B: Xiaomi

15

94 of 162 known

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Every value links to where we found it.

Only differences

ASamsung Galaxy S25 Ultra

BXiaomi 15

General

6 of 11 differ

Series

Galaxy S251Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Not available

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

SM-S938B, SM-S938B/DS, SM-S938BZKDEUB1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Exact EU hardware SM-S938B/DS and selected UK Titanium Black 12 GB/256 GB SKU SM-S938BZKDEUB. No US radio variant is added.

24129PN74G3Owner's manualgl123.alsgp0.mi-fds.com/gl123/XIAOMI/O3-Xiaomi%2015/O3_SI&QSG&Warranty_%E6%AC%A7%E8%A7%8414%E8%AF%AD%E5%B8%A6%E5%85%85%E7%89%88_%E6%AC%A7%E8%8B%B1%E5%90%88%E5%B9%B6%E7%89%88_20241118.pdfRead 5 October 2026Safety Information pages 2-3 identify exact G model.

GTIN / EAN

Not available

Not available

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

22 January 20252Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Article published 23 January but body dateline explicitly states San Jose announcement 22 January 2025.

Not available

Status

Available1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Available4Maker product pagemi.com/uk/support/terms/xiaomi-15-series-first-saleRead 5 October 2026

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Samsung Galaxy S24 Ultra7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Notebookcheck's review says the Galaxy S25 Ultra is the successor to the Galaxy S24 Ultra.11Reviewgsmarena.com/samsung_galaxy_s25_ultra-review-2793p2.phpRead 8 October 2026Design and introduction explicitly compare the preceding S24 Ultra generation. No missing model name is generated.

Xiaomi 147Reviewnotebookcheck.net/Xiaomi-15-First-Snapdragon-8-Elite-compact-flagship-arrives-to-challenge-Apple-iPhone-16-Pro-and-Vivo-X200-Pro-mini.910608.0.htmlRead 23 October 2026Notebookcheck calls the Xiaomi 14 the predecessor of the Xiaomi 15.

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Samsung Galaxy S26 Ultra16Reviewgsmarena.com/samsung_galaxy_s26_ultra-review-2939p6.phpRead 23 October 2026GSMArena's review says the Galaxy S26 Ultra costs about as much as last year's S25 Ultra.17Reviewgsmarena.com/samsung_galaxy_s26_ultra_vs_galaxy_s25_ultra_review_battery_camera_price_compared-news-72034.phpRead 23 October 2026GSMArena's comparison calls the Galaxy S26 Ultra a modest upgrade over the previous generation and the older Galaxy S25 Ultra.

Xiaomi 178Reviewnotebookcheck.net/Xiaomi-17-review-A-compact-Android-smartphone-heralding-a-new-era.1150243.0.htmlRead 23 October 2026Notebookcheck's review calls the Xiaomi 17 the successor to the Xiaomi 15.9Reviewgsmarena.com/xiaomi_17_series_to_launch_this_month_skipping_16_series_altogether-news-69496.phpRead 23 October 2026GSMArena reports that Xiaomi skipped the 16 lineup and went straight to the 17 series.

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

Not available

Not available

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

Not available

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

EU, GB1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

GB3Owner's manualgl123.alsgp0.mi-fds.com/gl123/XIAOMI/O3-Xiaomi%2015/O3_SI&QSG&Warranty_%E6%AC%A7%E8%A7%8414%E8%AF%AD%E5%B8%A6%E5%85%85%E7%89%88_%E6%AC%A7%E8%8B%B1%E5%90%88%E5%B9%B6%E7%89%88_20241118.pdfRead 5 October 2026Legal Information explicitly permits UK operation. The represented retail bundle is UK only.

ColoursiThe maker's own colour names

Titanium Silverblue, Titanium Black, Titanium Whitesilver, Titanium Gray, Titanium Pinkgold, Titanium Jetblack, Titanium Jadegreen3Press releasenews.samsung.com/us/samsung-galaxy-s25-series-sets-standard-of-ai-phone-true-ai-companion-unpacked2025Read 5 October 2026Model-specific standard and Samsung.com-exclusive finishes in launch Availability & Offers. Colour list only, no US hardware or dollar price inherited into EU model.

Black1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Exact UK reference: Black, 12 GB RAM, 256 GB storage, model 24129PN74G. Other regional batteries and colour-dependent thickness/weight are excluded.

Form factor

Bar1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Bar1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Maker product images identify a conventional non-folding handset.

OS support period (claimed)iYears of OS updates promised by the maker. Do not convert a number of Android generations into years, or mix an EU minimum counted from end of sale with a launch-based promise.

Not available

Not available

Security support period (claimed)iYears of security updates promised by the maker. State when the period starts in the source note. A regulatory minimum counted from end of market placement is a different basis.

7years2Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Seven years of security updates. Seven OS generations are not converted to years.

Not available

Security updates untiliPublished end date of security support for the exact model. Do not calculate a date from a rounded number of years.

31 January 20321Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Software Support explicitly publishes 31 January 2032. Not calculated from launch date.

Not available

Body

8 of 16 differ

HeightiBody height in portrait orientation. Foldables use the unfolded body.

162.8mm1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Physical specification explicitly uses HxWxD. No width-first launch-table confusion.

152.3mm1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

WidthiBody width in portrait orientation.

77.6mm1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

71.2mm1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Thickness

8.2mm1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Published handset body thickness, not camera-inclusive reviewer thickness.

8.08mm1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Thickness with camera bump

Not available

Not available

Folded dimensions

Not available

Not available

WeightiHandset weight without accessories. Colour and material differences belong in variants.

218g(7.7 oz)1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

191g(6.7 oz)1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Frame

Titanium1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Maker describes titanium exterior frame, excluding volume and side keys.

Aluminium2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026

Front

Corning Gorilla Armor 22Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Exact launch body identifies Gorilla Armor 2 as protective glass on the S25 Ultra display.7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Exact review Case and Specifications Display identify Corning Gorilla Armor 2 front glass.

Xiaomi Shield Glass2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026

BackiMaterial of the back cover as the maker names it. Aluminium is a metal back cover, as on a unibody. Silicone is a back the maker calls silicone, even with a leather or fabric look. A mixed back, such as metal with a glass insert, is Other.

Glass7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Case section expressly identifies rear Gorilla Glass Victus 2.

Glass2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026Phone Body section identifies Panda X Glass back shell for the represented Black finish.

Dust and water rating

IP682Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026

IP681Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Water resistance depth

1.5m2Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Fresh water up to 1.5 m in laboratory conditions.

1.5m1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Water resistance time

30min2Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Same IP68 footnote: up to 30 minutes, not permanent waterproofing.

30min1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

MIL-STD-810

Not available

Not available

SIM capacityiPhysical nano-SIM slots and maximum simultaneously active eSIMs. These counts are alternatives and must not be added to infer total active subscriptions.

Nano-SIMs2Active eSIM capacity2eSIM onlyNo1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026SIM1+SIM2, SIM1+eSIM or dual eSIM. Alternative configurations with maximum two active subscriptions, not four.

Nano-SIMs2Active eSIM capacity2eSIM onlyNo1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Two physical nano-SIMs. Supports two active eSIMs as an alternative to physical SIMs. Stored eSIM profile count is excluded.

Stylus

Built-in1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Not available

Stylus name

S Pen1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Not available

Display

13 of 24 differ

Screen sizeiMaker diagonal for the main display as a full rectangle. Rounded corners and cutouts reduce the viewable area.

6.9in(17.5 cm)1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Full rectangular diagonal. Rounded-corner area is not substituted.

6.36in(16.2 cm)1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Resolution

1440 × 3120px1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Published main display pixels in portrait width by height.

1200 × 2670px1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Pixel density

498ppi=CalculatedFrom Screen size and Resolution

460.3ppi=CalculatedFrom Screen size and Resolution

Aspect ratio

19.5:97Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Specifications Display: 19.5:9, matching portrait pixel dimensions.

Not available

Display type

LTPO OLED7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Display body expressly identifies LTPO technology.

OLED1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Display type (as published)

Dynamic AMOLED 2X1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

AMOLED1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Max refresh rateiHighest stated display refresh rate. Game-only or app-specific modes must be identified in the source note.

120Hz1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

120Hz1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Up to 120 Hz in supported apps.

Min refresh rateiLowest stated adaptive display refresh rate. A variable refresh display does not itself prove an LTPO backplane.

1Hz2Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Exact display table explicitly gives adaptive 1–120 Hz. LTPO backed separately where exact review states it.

1Hz1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Touch sampling rateiStandard touch sampling rate the maker states. A figure the maker ties to a game, boost or instant mode goes in the instant field. When the maker names no mode, the figure is stored here and the source note quotes the wording.

Not available

300Hz1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Up to the stated rate, actual rate depends on displayed content.

Instant touch samplingiHighest touch sampling rate the maker states for a game, boost or instant mode.

Not available

Not available

Display brightness (typical, claimed)iMaker stated typical brightness, not a reviewer measurement or automatic outdoor mode. On a foldable, the main inner screen.

Not available

Not available

Outdoor brightness (claimed)iMaker stated outdoor or high-brightness-mode value. A peak outdoor claim need not be full-screen sustained brightness.

Not available

1,000nits2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026Screen section identifies global HBM 1000 nits. Manual maximum (Typ) 800 nits is a manually adjusted maximum and is not stored as typical brightness.

Peak display brightness (claimed)iManufacturer-stated peak brightness. Store HDR, window size and operating mode only as stated in the source note. Outdoor/HBM claims use the separate field. On a foldable, the main inner screen.

Not available

3,200nits1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 20263200 nits maker peak. 25% display area.

Minimum brightness

Not available

2nits2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026

Colour depth per channeliBits for each RGB colour channel, not total bits per pixel. A 24-bit RGB pixel means 8 bits per channel. No native-versus-dithered assumption.

8bits8Reviewgsmarena.com/samsung_galaxy_s25_ultra-review-2793p3.phpRead 8 October 2026Lab section explicitly describes the S25 Ultra as an 8-bit panel. Not inferred solely from the maker 16M color count.

12bits2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026

DCI-P3 coverage

Not available

Not available

HDR playback formatsiHDR formats the phone can display or play back. Recorded video HDR formats use the separate video field.

HLG, HDR10, HDR10+7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Additional features HDR: HLG, HDR10, HDR10+. Display formats, not camera recording formats.

HDR10, HDR10+, Dolby Vision, HDR Vivid1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

PWM dimming frequency

Not available

Not available

Always-on display

Yes5Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 8 October 2026Dedicated Always On Display section printed page 131.

Yes1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Front camera cutout

Punch hole5Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 8 October 2026Same exact device layout shows front camera through display hole.

Not available

Cover screen sizeiThe outer screen of a foldable, or a second screen on the back of a phone, such as on the Xiaomi 17 Pro Max.

Not available

Not available

Cover screen resolutioniWidth and height as the screen stands when the closed phone, or the phone with a rear screen, is held upright. Some makers print the long side first, such as Motorola's 1272 x 1080 for a screen that is 1080 px wide.

Not available

Not available

Cover screen refresh rate

Not available

Not available

Cover screen type

Not available

Not available

Platform

6 of 10 differ

OS at launch

Android 152Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Dated technical table: Android 15. Current support manual OS revisions do not overwrite launch OS.

Android 152Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026Operating System first-batch answer explicitly identifies Android 15.

Software

One UI 915Maker product pagedoc.samsungmobile.com/SM-S938B/EUX/doc.htmlRead 8 October 2026Official October 6, 2026 released update explicitly names One UI 9. Android 15/One UI 7 remain historical review conditions.

Xiaomi HyperOS 21Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Latest stable OS (verified)iLatest stable OS explicitly verified for the exact model on the source accessed date. A downloadable manual, beta, or launch specification does not prove a stable update rollout.

Android 1715Maker product pagedoc.samsungmobile.com/SM-S938B/EUX/doc.htmlRead 8 October 2026Exact EUX model log and linked English history read. Released S938BXXUCDZIF, October 6, 2026, explicitly Android 17. Not a beta or manual inference.

Not available

Chipset

Qualcomm Snapdragon 8 Elite for Galaxy2Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026

Qualcomm Snapdragon 8 Elite1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Process

3nm10Reviewgsmarena.com/samsung_galaxy_s25_ultra-13322.phpRead 8 October 2026Exact handset chipset row identifies Snapdragon 8 Elite for Galaxy at 3 nm. Not a chip-supported radio/display maximum.

3nm1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

CPU cores

81Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

81Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

CPU configurationiCPU core counts, names and maximum clocks for the exact chipset configuration. Do not copy clocks from another regional chip or generic faster chip edition.

ASamsung Galaxy S25 Ultra

Count	Core	Max clock (GHz)
2	Qualcomm Oryon Gen 2 Prime	4.47
6	Qualcomm Oryon Gen 2 Performance	3.5

Source7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Exact device review establishes two Oryon Gen 2 Prime and six Performance cores. Maker clocks are now stored at UK published precision, 4.47 GHz and 3.5 GHz. Rounded or more precise generic chart clocks are not substituted.12Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 8 October 2026Exact UK maker table publishes 4.47 GHz and 3.5 GHz. Established two Prime/six Performance mapping comes from the device review. Maker precision is used rather than the review/database 3.53 GHz publication.

BXiaomi 15

Count	Core	Max clock (GHz)
2	Prime	4.32
6	Performance	3.53

Source1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Max CPU clock

4.47GHz=CalculatedFrom CPU configuration

4.32GHz=CalculatedFrom CPU configuration

GPU

Qualcomm Adreno 8307Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Exact tested German 12 GB/256 GB device Specifications graphics adapter, not chipset theoretical capability.

Not available

NPU performance

Not available

Not available

Memory

1 of 6 differ

RAM

12GB1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 20262Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Model-specific launch memory matrix identifies 12 GB for every capacity.

12GB1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Installed memory for the exact sold configuration. Virtual RAM extension is excluded.4Maker product pagemi.com/uk/support/terms/xiaomi-15-series-first-saleRead 5 October 2026Product table explicitly lists 12 GB + 256 GB.

RAM typeiActual installed memory technology published for the phone. A chipset supported-memory list does not prove which type this device uses.

LPDDR5X7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Specifications Memory: installed LPDDR5x.

LPDDR5X1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Storage (nominal)iManufacturer nominal capacity before formatting, not available space. Published TB values use decimal SI conversion, 1 TB = 1000 GB. Literal maker GB values stay as published.

256 GB, 512 GB, 1 TB1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Nominal marketed capacity from model-specific launch matrix and sold UK options, not formatted free space. 1 TB is 1000 decimal GB.2Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Exact model column of global launch matrix lists nominal capacities. US launch lacks the European S25 512 GB option and is not used for this list.

256GB1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Nominal marketed decimal GB.4Maker product pagemi.com/uk/support/terms/xiaomi-15-series-first-saleRead 5 October 2026Exact product row, not an assumed arbitrary RAM/storage pairing.

Storage type

UFS 4.07Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Specifications Storage: exact tested 256 GB UFS 4.0. Other-capacity interface remains unknown through variant rows.

UFS 4.01Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Manufacturer installed storage technology.

Memory card

None10Reviewgsmarena.com/samsung_galaxy_s25_ultra-13322.phpRead 8 October 2026Device Card slot explicitly says No.

None2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026

Max card size

Not available

Not available

Rear cameras

11 of 14 differ

Physical rear camerasiOne row per physical imaging camera. Sensor crops, optical-quality zoom modes, autofocus laser and depth scanners do not add photographic lenses. A colour or multispectral sensor is not a camera row, even when the maker gives it a megapixel figure. A depth camera with its own megapixel figure, such as a 2 MP depth camera, is a row with the depth role. A ToF or lidar scanner is not a row.

ASamsung Galaxy S25 Ultra

Role	Resolution (MP)	Aperture (f/)	Focal length (35 mm equivalent) (mm)	Sensor optical format	Pixel size (µm)	Autofocus	OIS	Optical zoom	Field of view	Sensor
Main	200	1.7	23	1/1.3"	0.6	Not available	Yes	Not available	85°	Samsung ISOCELL HP2
Periscope telephoto	50	3.4	111	1/2.52"	0.7	PDAF	Yes	5×	22°	Sony IMX854
Ultrawide	50	1.9	13	1/2.52 inch	0.7	Dual Pixel PDAF	Not available	Not available	120°	Samsung ISOCELL JN3
Telephoto	10	2.4	69	1/3.52"	1.12	Dual Pixel PDAF	Yes	3×	36°	Sony IMX754

Source2Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Exact launch physical lens table gives roles, apertures, FoV and physical 3x/5x zoom. Optical-quality 2x/10x crops add no lens. Base/Plus launch omits tele OIS, so only exact device review adds it.7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Valid main and telephoto physical properties remain sourced to the exact review table. Its ultrawide GN3, 1/1.57 inch and native 1.0 micrometre entries are contradicted by manufacturer-confirmed JN3/1/2.52/native 0.7 evidence and are not used. Other generic autofocus descriptions are not guessed as an exact subtype.13Reviewlesnumeriques.com/telephone-portable/labo-samsung-galaxy-s25-ultra-50-megapixels-pour-l-ultra-grand-angle-pour-quels-resultats-n232563.htmlRead 8 October 2026Ultrawide row corrected: lab identifies S5KJN3 in device apps, then explicitly attributes 1/2.52 inch optical format and native 0.7 micrometre pixels to Samsung confirmation. GSMArena independently agrees on JN3/native 0.7, with rounded 1/2.5 format. Old Notebookcheck GN3/1/1.57/native 1.0 ultrawide claims are excluded. Maker 50 MP, f/1.9, 120 degrees and valid other lenses are preserved.14Reviewgsmarena.com/samsung_galaxy_s25_ultra-review-2793p5.phpRead 8 October 2026Exact physical 5x camera table publishes native 0.7 micrometre, nominal 111 mm equivalent and PDAF. Separate binned 1.4 micrometre and reported image EXIF 115 mm are not substituted. Maker 10 MP 3x resolution is retained despite the table 12 MP output label.

BXiaomi 15

Role	Resolution (MP)	Aperture (f/)	Focal length (35 mm equivalent) (mm)	OIS	Optical zoom	Field of view	Sensor
Main	50	1.62	23	Yes	Not available	Not available	Light Fusion 900
Telephoto	50	2	60	Yes	2.6×	Not available	Not available
Ultrawide	50	2.2	14	Not available	Not available	115°	Not available

Source1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 20262Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026Camera zoom answer identifies exact physical telephoto magnification relative to the main camera: 2.6x.

Number of rear cameras

4=CalculatedFrom Physical rear cameras

3=CalculatedFrom Physical rear cameras

Main camera

200MP=CalculatedFrom Physical rear cameras

50MP=CalculatedFrom Physical rear cameras

Longest physical-lens optical zoomiLargest optical zoom factor of a physical telephoto lens. Optical-quality sensor crops and advertised zoom ranges are excluded.

5×=CalculatedFrom Physical rear cameras

2.6×=CalculatedFrom Physical rear cameras

Maximum photo digital zoomiHighest stated digital zoom for photos. Video zoom can have a different limit. A total zoom factor such as Up to 100x counts, also when the maker adds AI processing to it.

100×1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

60×1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Flash

Rear flash12Maker product pagesearchapi.samsung.com/v6/front/b2c/product/spec/detailRead 8 October 2026Exact UK Titanium Black 12 GB/256 GB maker table explicitly says Rear Camera - Flash: Yes.

Not available

Camera features

Night mode, Portrait mode, Pro mode, Pro video, Panorama, Super steady, 10-bit HDR video, Log video5Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 8 October 2026Exact EU model guide printed camera pages 67 to 78 documents these modes and settings. No named HDR format is inferred from only generic HDR wording.

Not available

Maximum rear video rate per resolutioniHighest stated capture frame rate at each resolution, including slow-motion modes. Lens restrictions and cloud-processed output must be named in the source note.

ASamsung Galaxy S25 Ultra

Width (px)	Height (px)	Highest capture rate (fps)
7680	4320	30
3840	2160	120
1920	1080	240

Source1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Recording 8K30 and slow motion 4K120/FHD240. Highest documented capture rate per resolution, including slow motion. Playback-only 8K60 excluded. No every-lens claim.

BXiaomi 15

Width (px)	Height (px)	Highest capture rate (fps)
7680	4320	30
3840	2160	60
1920	1080	960
1280	720	1,920

Source1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Camera specifications and FAQ Camera Q14: 720p 1920 fps main camera only, 1080p 960 fps main/telephoto/ultrawide. Advertised slow motion may include interpolation. Native capture is not established. Regular video 8K 30 fps, 4K 60 fps, 1080p 60 fps and 720p 30 fps.

Max video resolution

7680 × 4320px=CalculatedFrom Maximum rear video rate per resolution

7680 × 4320px=CalculatedFrom Maximum rear video rate per resolution

Recorded video HDR formatsiHDR formats explicitly supported for recording. Display playback support does not establish camera recording support.

HDR10+10Reviewgsmarena.com/samsung_galaxy_s25_ultra-13322.phpRead 8 October 2026Device video row explicitly lists recorded HDR10+. EU guide independently describes 10-bit HDR recording. Playback formats are separate.

Dolby Vision, HDR10+1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Log recording

Yes2Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Launch body explicitly identifies Galaxy Log video colour-grading workflow. No unsupported HDR recording-format enum is inferred from generic 10-bit HDR.

Yes1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Video recording codecsiCodecs explicitly documented for recorded video. Excludes playback-only codecs and container names such as MP4 and MKV.

Not available

Not available

Video stabilisation

OIS, Gyro EIS10Reviewgsmarena.com/samsung_galaxy_s25_ultra-13322.phpRead 8 October 2026Device video row expressly names gyro-EIS and main lens OIS. No sensor-shift type is inferred.

Not available

Maximum slow-motion capture rateiCaptured frames per second, not the playback rate. Recording resolution and supported camera belong in the source note.

240fps1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Not available

Front camera

3 of 3 differ

Front camerasiOne row per physical front imaging camera. Depth or face authentication components are not additional selfie cameras.

ASamsung Galaxy S25 Ultra

Role	Resolution (MP)	Aperture (f/)	Focal length (35 mm equivalent) (mm)	Sensor optical format	Pixel size (µm)	Autofocus	Field of view	Sensor
Main	12	2.2	25	1/3.2 inch	1.12	Dual Pixel PDAF	80°	Samsung ISOCELL 3LU

Source2Press releasesamsungmobilepress.com/articles/samsung-galaxy-s25-series-sets-the-standard-of-ai-phone-as-a-true-ai-companionRead 5 October 2026Exact launch table gives 12 MP, f/2.2 and 80-degree FoV. Generic autofocus Yes is not guessed as PDAF.7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Exact Specifications Secondary Camera. Generic AF remains untyped, not assumed PDAF.14Reviewgsmarena.com/samsung_galaxy_s25_ultra-review-2793p5.phpRead 8 October 2026Exact front camera table publishes 1/3.2 inch optical format, native 1.12 micrometre and dual-pixel PDAF. Existing separately published nominal 25 mm is retained rather than silently replacing it with this review 26 mm.

BXiaomi 15

Role	Resolution (MP)	Aperture (f/)
Main	32	2

Source1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Maximum front video rate per resolutioniHighest stated front-camera frame rate at each resolution, including slow motion where documented.

ASamsung Galaxy S25 Ultra

Width (px)	Height (px)	Highest capture rate (fps)
3840	2160	60
1920	1080	30

Source10Reviewgsmarena.com/samsung_galaxy_s25_ultra-13322.phpRead 8 October 2026Exact selfie recording row explicitly gives 4K30/60 and Full HD30. Rear slow motion is separate.

BXiaomi 15

Width (px)	Height (px)	Highest capture rate (fps)
3840	2160	60
1920	1080	60
1280	720	30

Source1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Highest maker-listed front recording rates: 4K 60 fps, 1080p 60 fps and 720p 30 fps.

Front autofocus

Yes=CalculatedFrom Front cameras

Not available

Audio

3 of 4 differ

Stereo speakers

Yes1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Yes1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

3.5 mm jack

No1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Earjack USB Type-C. Complete manual layout shows USB-C headphone/multipurpose connector and no 3.5 mm socket.

Not available

Audio features

Not available

Hi-Res Audio, Hi-Res Audio Wireless, Dolby Atmos1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

MicrophonesiPhysical microphones in the phone. Noise reduction channel count does not always establish microphone count.

35Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 8 October 2026Exact device layout printed pages 5–6 for Ultra, 9–10 for S25/Plus. Three unique microphones at top, bottom and rear. Air vent and laser AF are not microphones.

41Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Network

9 of 10 differ

Network

GSM, LTE, 5G1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Exact manufacturer Infra cell states GSM, LTE and 5G Sub6. It states 3G WCDMA/UMTS, which does not by itself prove HSPA. Existing enum cannot represent WCDMA/UMTS, so HSPA is omitted while exact UMTS bands remain separately stored.

GSM, UMTS, LTE, 5G3Owner's manualgl123.alsgp0.mi-fds.com/gl123/XIAOMI/O3-Xiaomi%2015/O3_SI&QSG&Warranty_%E6%AC%A7%E8%A7%8414%E8%AF%AD%E5%B8%A6%E5%85%85%E7%89%88_%E6%AC%A7%E8%8B%B1%E5%90%88%E5%B9%B6%E7%89%88_20241118.pdfRead 5 October 2026Exact model radio table explicitly names GSM, LTE and 5G NR. The maker spec page lists 3G bands, so UMTS is stored. UMTS/WCDMA alone is not proof of HSPA, so HSPA is omitted.

2G bandsiExact model radio bands. State model and region. Do not substitute a worldwide union for one regional model.

GSM 850, GSM 900, DCS 1800, PCS 19001Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

B2, B3, B5, B81Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

3G bandsiExact model UMTS/WCDMA/HSPA bands or published MHz ranges. State which notation the source uses.

B1, B2, B4, B5, B81Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

B1, B2, B4, B5, B6, B8, B191Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

4G bandsiExact model LTE bands, not channel frequencies or aggregate world coverage.

B1, B2, B3, B4, B5, B7, B8, B12, B13, B17, B18, B19, B20, B25, B26, B28, B32, B66, B38, B39, B40, B411Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Exact EU full Network/Bearer table combines FDD and TDD band IDs.

B1, B2, B3, B4, B5, B7, B8, B12, B13, B17, B18, B19, B20, B25, B26, B28, B32, B66, B38, B39, B40, B41, B42, B481Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

5G bandsiExact model 5G NR bands. A union of sub-6 and mmWave models is not evidence that every variant supports both.

n1, n2, n3, n5, n7, n8, n12, n20, n25, n26, n28, n66, n38, n40, n41, n77, n78, n751Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Exact EU Sub6 FDD/TDD/SDL IDs only, no US mmWave union.

n1, n2, n3, n5, n7, n8, n12, n20, n25, n26, n28, n38, n40, n41, n48, n66, n75, n77, n781Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Exact international G model sold in the UK. SA and NSA lists are unioned without adding China-only bands.

5G modes

Not available

SA, NSA1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

5G mmWave

No1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Full Infra cell expressly identifies Sub6 FDD/TDD/SDL.

Not available

Maximum modem download rateiTheoretical maker-published device/modem rate. Name the radio technology, aggregation and carrier conditions in the source note. Chip capability alone does not establish device support.

Not available

Not available

Satellite

Not available

None2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026

Wi-Fi calling

Not available

Yes2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026

Connectivity

7 of 13 differ

Wi-Fi

Wi-Fi 71Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Wi-Fi 71Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Capability depends on regional availability, local network support and applicable OTA.

Wi-Fi bands

2.4 GHz, 5 GHz, 6 GHz1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Not available

Bluetooth

5.41Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

6.01Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Bluetooth audio codecsiWireless audio codecs explicitly supported by the phone. Local audio file formats and codecs supported only by the chipset are excluded.

SBC, AAC, aptX, LDAC, SSC7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Specifications Additional features Bluetooth Audio Codecs exact list. Local playback formats excluded.

SBC, AAC, aptX, aptX HD, aptX Adaptive, LDAC, LHDC 5.0, LC31Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Bluetooth codec support, excluding playback-only file formats. ASHA and Auracast are not audio codecs.

NFC

Yes1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Yes1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Ultra-wideband

Yes1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Not available

Positioning

GPS, GLONASS, BeiDou, Galileo, QZSS1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

GPS (L1+L5), Galileo (E1+E5a), GLONASS (G1), BeiDou, QZSS (L1+L5), NavIC (L5)1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Satellite signal bands only. Network/data/SAP positioning are excluded.

Dual-frequency GNSSiMultiple GNSS signal frequencies expressly documented by the maker, not a count of satellite constellations.

Yes7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Additional features GNSS lists GPS L1/L5, BeiDou B1/B1C/B2a, Galileo E1/E5a and QZSS L1/L5.

Yes1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Connector

USB-C1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

USB-C1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

USB data standardiUSB data protocol/speed, distinct from the USB-C connector shape, cable rating and charging capability.

USB 3.2 Gen 11Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Not available

Video out over USBiWired external display output over the physical port. Casting or wireless desktop mode does not establish wired video support.

Yes5Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 8 October 2026Samsung DeX section pages 108–109 explicitly describes connection to external displays via HDMI adapter. Not inferred from connector shape or generic DeX menu.

Yes2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026Port section explicitly supports wired Type-C video output for this exact Xiaomi model. Wireless casting is distinct.

IR blaster

Not available

Yes1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

FM radio

No10Reviewgsmarena.com/samsung_galaxy_s25_ultra-13322.phpRead 8 October 2026Device Radio row explicitly says No.

No2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026

Features and sensors

3 of 5 differ

FingerprintiUnder-display, type not stated is for a maker that says in-display or under-display but not optical or ultrasonic.

Ultrasonic, under-display7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Input devices explicitly identifies ultrasonic sensor in OLED panel.

Ultrasonic, under-display1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Face unlockiYes, type not stated is for a maker that names face unlock or facial recognition but not 2D or 3D.

Not available

2D2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026

Sensors

Accelerometer, Barometer, Fingerprint sensor, Gyro sensor, Geomagnetic sensor, Hall sensor, Light sensor, Proximity sensor1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

Proximity sensor, Ambient light sensor, Accelerometer, Gyroscope, Electronic compass, Flicker sensor, Laser focus sensor, Barometer1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Extra buttonsiAdditional physical controls beyond ordinary power and volume buttons. On-screen navigation buttons are excluded.

Not available

Not available

Haptic motor

Linear vibration motor7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Input devices expressly identifies linear vibration motor.

X-axis linear vibration motor1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Battery and charging

10 of 17 differ

Rated battery capacityiRated/minimum manufacturer capacity when available. Multi-cell pack-equivalent mAh must be explicitly published and identified in the source note. Regional hardware must match.

4,855mAh4Maker spec sheet (PDF)images.samsung.com/is/content/samsung/p6/common/energylabel/common-energylabel-sm-s938bzkdeub-productfiche.pdfRead 5 October 2026Page 1 item 10 rated capacity, distinct from typical capacity.

Not available

Battery capacity (typical)iManufacturer typical capacity, kept separate from rated/minimum capacity. For series cells, identify any explicitly published pack-equivalent figure.

5,000mAh1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

5,240mAh1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Rated battery energyiRated pack energy in watt-hours. Do not calculate it from rounded voltage or mAh. Typical energy, when different, belongs in the source note.

Not available

Not available

Battery type

Li-ion7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Specifications Battery explicitly identifies Lithium-Ion.

Li-Po2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026Manufacturer Battery cell-type answer. No silicon-carbon chemistry inferred from marketing battery names.

Claimed battery lifeiMaker runtime claim for a named use case. Identify up-to/at-least wording, regional battery hardware and test conditions in the source note.

ASamsung Galaxy S25 Ultra

Use case	Hours (h)
Video playback	31

Source1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026Up-to video playback claim, not EU mixed-use endurance or reviewer Wi-Fi browsing test.

BXiaomi 15

Not available

Maximum wired charging power (claimed)iManufacturer-stated handset charging input maximum. An adapter rating, power needed to achieve maximum speed, common-charger requirement or reviewer peak draw does not establish this value.

45W7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Battery life body explicitly describes maximum handset wired input, distinct from recommended adapter power.

90W2Maker product pagemi.com/uk/support/faq/details/KA-536414Read 5 October 2026FAQ Battery Q14 explicitly states phone charging power is 90 W separately from standard charger power in Q15. Overview defines 90 W HyperCharge marketing label as charger output. This value rests on the explicit handset FAQ answer, not adapter rating. Actual power depends on cable, remaining charge and environment.

Wired charging standards

USB Power Delivery, USB PD PPS7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Specifications Connections explicitly lists USB-C Power Delivery. Protocol revision not inferred.8Reviewgsmarena.com/samsung_galaxy_s25_ultra-review-2793p3.phpRead 8 October 2026Lab retest explicitly identifies USB PD/PPS support, including chargers limited to 3 to 3.25 A. Claimed 45 W handset maximum stays separate from the measured 39 W draw.

Xiaomi HyperCharge, QC 3+, QC 3.0, QC 2.0, USB PD 3.0, USB PD 2.0, MI FC 2.01Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026Manufacturer-supported phone charging standards. The included-adapter rating is not inferred.

Charge 0 to 50% (claimed)iManufacturer time to 50% from the stated starting level. A 55% or 75% claim is not interchangeable. Charger, cable and conditions belong in the source note.

Not available

Not available

Charge 0 to 100% (claimed)iManufacturer full-charge claim. A review measurement uses measured_charge_time_min instead.

Not available

Not available

Wireless charging

Yes5Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 8 October 2026Charging the battery section page 13 explicitly identifies built-in wireless coil and wireless charging.

Yes1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Wireless charging power

15W7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Same battery section explicitly states maximum 15 W wireless.

50W1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Wireless standardsiDevice wireless charging standard or qualification. Qi2 Ready needs a compatible magnetic case and does not mean built-in handset magnets.

Qi2 Ready (magnetic case required)10Reviewgsmarena.com/samsung_galaxy_s25_ultra-13322.phpRead 8 October 2026Device charging row explicitly says 15 W Qi2 Ready. A magnetic case is required and built-in alignment magnets are not inferred. The older review introduction 25 W Qi2 claim is contradicted by the lab chapter and is not used.

Proprietary1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Built-in alignment magnetsiTrue only for alignment magnets built into the handset. A magnetic case or accessory does not make this true.

Not available

Not available

Reverse wireless output poweriPhone output power while charging another device wirelessly, not its wireless input rating.

4.5W10Reviewgsmarena.com/samsung_galaxy_s25_ultra-13322.phpRead 8 October 2026Device charging row expressly gives 4.5 W reverse wireless output. Not its 15 W wireless input.

Not available

Reverse wired

Yes7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Battery life body expressly says S25 Ultra can supply other devices with power both wired and wirelessly.

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Charger in boxiWhether a mains charging adapter is included in the exact regional retail bundle. A USB cable alone is not a charger.

No7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Accessories section: power adapter not supplied, sold separately.

No1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026UK specifications explicitly exclude a mains adapter. A launch promotional adapter gift is separate from standard box contents.

Included adapter rated poweriRated power of the included adapter, distinct from the phone maximum charging input.

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Measured

6 of 9 differ

Geekbench single-coreiReviewer CPU single-core result. Geekbench version, tested configuration and modes belong in the source note. Do not combine versions.

3,200points7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Verified Geekbench 6 major-series single-core score from exact German 12 GB/256 GB Android 15 device. Current comparison heading says 6.7 but original 2025 run minor version is unknown. No inferred 2026 retest.

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Geekbench multi-coreiReviewer CPU multi-core result. Geekbench version and tested configuration belong in the source note.

10,020points7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Same verified Geekbench 6 major-series chart, multi-core. Geekbench 5.5 result excluded.

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3DMark Wild Life ExtremeiReviewer Wild Life Extreme score. Unlimited, Original, Solar Bay, stress-test stability and frame rates are different measurements. Version and run/loop conditions belong in the source note.

6,845points7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Ordinary 3DMark Wild Life Extreme score on exact review unit, not Unlimited, stress stability or another device average.

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AnTuTuiReviewer AnTuTu total score. Test version, operating system and tested RAM/storage belong in the source note. Cross-version and cross-OS scores are not directly comparable.

2,262,067points7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026AnTuTu v10 Total Score chart, exact German 12 GB/256 GB Android 15 review unit. Current heading explicitly states major version 10. Original patch/minor version not published. Device row only, not chipset average.

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Display brightness (measured)iReviewer brightness result. Window size, manual/auto or HDR mode and test method belong in the source note. Not automatically a sustained full-screen peak. On a foldable, the main inner screen.

2,613nits7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Display APL18 Peak Brightness result on exact review unit. HDR pattern and full-white results are separate and not substituted.

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PWM dimming (measured)iMeasured by a reviewer, not claimed by the maker

480Hz7Reviewnotebookcheck.net/Samsung-Galaxy-S25-Ultra-review-The-AI-phone-relies-fully-on-artificial-intelligence-and-small-hardware-upgrades.968346.0.htmlRead 5 October 2026Display body differentiates 240 Hz minimum-brightness flicker and 480 Hz PWM at higher brightness.

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Mixed-use battery life (measured)iReviewer mixed-use active endurance. Identify the test method. Continuous web browsing or video-only tests cannot populate this field.

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Full charge time (measured)iReviewer time to a full charge, with start/end percentage and charger identified. A 15/30-minute percentage result is not a full-charge time.

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Loudspeaker loudness (measured)iReviewer integrated loudness in LUFS. Less negative numbers mean louder output. This is not sound pressure level in dB.

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EU label and regulatory

8 of 10 differ

EU energy class

B4Maker spec sheet (PDF)images.samsung.com/is/content/samsung/p6/common/energylabel/common-energylabel-sm-s938bzkdeub-productfiche.pdfRead 5 October 2026Page 1 item 6.

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Battery endurance per cycle (EU test)iStandardized EU endurance test result for the exact registered model. Preserve only the precision the source publishes. This is not a normal mixed-use or video-playback runtime.

44h4Maker spec sheet (PDF)images.samsung.com/is/content/samsung/p6/common/energylabel/common-energylabel-sm-s938bzkdeub-productfiche.pdfRead 5 October 2026Page 1 item 8, whole-hour mixed-use regulatory endurance.

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Battery endurance in cycles (EU test)iMinimum standardized charge cycles before the specified remaining capacity threshold. Notes retain greater-than or at-least qualifiers. EPREL prints this value in hundreds, so 10 there is stored as 1000.

2,000cycles4Maker spec sheet (PDF)images.samsung.com/is/content/samsung/p6/common/energylabel/common-energylabel-sm-s938bzkdeub-productfiche.pdfRead 5 October 2026Page 1 item 9, default-settings 2000 cycles.

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Drop resistance class

A4Maker spec sheet (PDF)images.samsung.com/is/content/samsung/p6/common/energylabel/common-energylabel-sm-s938bzkdeub-productfiche.pdfRead 5 October 2026Page 1 item 14.

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Repairability class

C4Maker spec sheet (PDF)images.samsung.com/is/content/samsung/p6/common/energylabel/common-energylabel-sm-s938bzkdeub-productfiche.pdfRead 5 October 2026Page 1 item 20.

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SAR head (US)iHighest published head SAR under the US 1 g tissue method for the exact model. Record separation and conditions when stated.

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SAR body (US)iHighest published body SAR under the US 1 g tissue method. Do not substitute the limb result or EU 10 g result.

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SAR head (EU)iHighest published head SAR under the EU 10 g tissue method for the exact model.

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0.993W/kg3Owner's manualgl123.alsgp0.mi-fds.com/gl123/XIAOMI/O3-Xiaomi%2015/O3_SI&QSG&Warranty_%E6%AC%A7%E8%A7%8414%E8%AF%AD%E5%B8%A6%E5%85%85%E7%89%88_%E6%AC%A7%E8%8B%B1%E5%90%88%E5%B9%B6%E7%89%88_20241118.pdfRead 5 October 2026English Safety Information page 2: highest head SAR, 10 g tissue, no separation.

SAR body (EU)iHighest published body SAR under the EU 10 g tissue method, excluding separate limb values.

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0.997W/kg3Owner's manualgl123.alsgp0.mi-fds.com/gl123/XIAOMI/O3-Xiaomi%2015/O3_SI&QSG&Warranty_%E6%AC%A7%E8%A7%8414%E8%AF%AD%E5%B8%A6%E5%85%85%E7%89%88_%E6%AC%A7%E8%8B%B1%E5%90%88%E5%B9%B6%E7%89%88_20241118.pdfRead 5 October 2026English Safety Information page 2: highest body SAR, 10 g tissue, 5 mm separation.

Hearing aid compatibilityiPublished hearing-aid coupling or rating. Older M/T ratings, ASHA/HAP protocol support and conversational gain are different claims and must be named as published.

Android Audio Streaming for Hearing Aid (ASHA)1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

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In the box

1 of 1 differ

In the box

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Mobile Phone, USB Type-C Cable, SIM Eject Tool, Protective Case, Safety Information, Quick Start Guide and Warranty Card, Desiccant1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Links

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Product page

www.samsung.com/uk/smartphones/galaxy-s25-ultra1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

www.mi.com/uk/product/xiaomi-151Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Spec sheet

www.samsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeub1Maker product pagesamsung.com/uk/business/smartphones/galaxy-s/galaxy-s25-ultra-titanium-black-256gb-sm-s938bzkdeubRead 5 October 2026

www.mi.com/uk/product/xiaomi-15/specs1Maker product pagemi.com/uk/product/xiaomi-15/specsRead 5 October 2026

Manual

org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx5Owner's manualorg.downloadcenter.samsung.com/downloadfile/ContentsFile.aspxRead 8 October 2026Samsung English May 2025 Rev.2.0 Android 15 guide explicitly lists exact SM-S931B/DS, SM-S936B/DS and SM-S938B/DS on cover. Later added S25 Edge column is not borrowed.

gl123.alsgp0.mi-fds.com/gl123/XIAOMI/O3-Xiaomi%2015/O3_SI&QSG&Warranty_%E6%AC%A7%E8%A7%8414%E8%AF%AD%E5%B8%A6%E5%85%85%E7%89%88_%E6%AC%A7%E8%8B%B1%E5%90%88%E5%B9%B6%E7%89%88_20241118.pdf3Owner's manualgl123.alsgp0.mi-fds.com/gl123/XIAOMI/O3-Xiaomi%2015/O3_SI&QSG&Warranty_%E6%AC%A7%E8%A7%8414%E8%AF%AD%E5%B8%A6%E5%85%85%E7%89%88_%E6%AC%A7%E8%8B%B1%E5%90%88%E5%B9%B6%E7%89%88_20241118.pdfRead 5 October 2026

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

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Warranty

1 of 1 differ

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

2years4Maker spec sheet (PDF)images.samsung.com/is/content/samsung/p6/common/energylabel/common-energylabel-sm-s938bzkdeub-productfiche.pdfRead 5 October 2026Page 1 item 25, 24-month supplier guarantee.

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Both are also in the API. Back to all phones.