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Xiaomi Xiaomi 12 vs Xiaomi Xiaomi 15 Ultra

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

XiaomiXiaomi 12XiaomiXiaomi 15 Ultra
Overview
ReleasedDecember 2021February 2025
Display
Screen size6.28″6.73″
Resolution2400 × 10803200 × 1440
Sharpness419 pixels per inch521 pixels per inch
PanelOLEDLTPO OLED
Refresh rate120 Hz120 Hz
Peak brightness–3,200 nits
Display typeAMOLED DotDisplay; 20:9 aspect ratioWQHD+ LTPO AMOLED with 1–120 Hz adaptive refresh, 68 billion colours and DCI-P3; All Around Liquid Display glass curves around the edges
Pixel density–522 ppi
Brightness detail–3,200 nits multi-scenario peak brightness
Always-on display–Always-active Display with 2–80 nits adaptive brightness and refresh as low as 1 Hz
Screen protectionCorning Gorilla Glass VictusXiaomi Shield Glass 2.0; camera surround protected by Corning Gorilla Glass 7i
Display featuresUp to 480 Hz touch sampling; over 68 billion colours; DCI-P3 gamut; JNCD approximately 0.61, Delta E approximately 0.59; 5,000,000:1 contrast; HDR10+, Dolby Vision, 360° ambient light sensing and DisplayMate A+DC dimming at high brightness, 1,920 Hz PWM dimming at low brightness, 300 Hz touch sampling, Original Colour PRO, Pro HDR, wet touch, HDR10+, Dolby Vision and TÜV low-blue-light, flicker-free and circadian-friendly certifications
Performance
ChipQualcomm Snapdragon 8 Gen 1Qualcomm Snapdragon 8 Elite
Memory8 GB – 12 GB16 GB
Storage128 GB, 256 GB512 GB, 1 TB
CPU4 nm process; one Cortex-X2-based core at 3.0 GHz, three Cortex-A710-based cores at 2.5 GHz and four Cortex-A510-based cores at 1.8 GHzSecond-generation TSMC 3 nm Qualcomm Oryon CPU; two prime cores up to 4.32 GHz and six performance cores up to 3.53 GHz
GPUQualcomm Adreno; model number not published on the maker sheetQualcomm Adreno GPU; maker gives no numeric suffix
AI engineSeventh-generation Qualcomm AI EngineQualcomm AI engine; maker states 80 TOPS computing power
Storage typeLPDDR5 RAM and UFS 3.1 storage; 12 GB/256 GB configuration is for other markets, with UK configurations using 8 GB RAMLPDDR5X RAM at 8,533 Mbps and UFS 4.1 storage; UK 16 GB/512 GB or 16 GB/1 TB
CoolingLiquidCool Technology with vapour chamber, graphite sheets and boron nitride filmXiaomi 3D Dual-Channel IceLoop system with 5,100 mm² overall loop heat-pipe area
Cameras
Main camera50 MP50 MP
Ultra wide camera13 MP50 MP
Telephoto cameraNone200 MP
Optical zoomNone4.3×
Front camera32 MP32 MP
Main camera50 MP, 1/1.56-inch sensor, ƒ/1.88, OIS; 1 µm pixels and 4-in-1 2 µm Super PixelsLeica Summilux, Sony LYT-900, 50 MP, f/1.63 fixed aperture, 1-inch sensor, 23 mm equivalent focal length, eight-element lens, 4-axis OIS and 4-in-1 binning to 3.2 µm pixels
Ultra wide camera13 MP, ƒ/2.4, 123° field of viewLeica 50 MP, f/2.2, 14 mm equivalent focal length, 115° field of view, six-element lens, 1.28 µm binned pixels and macro focusing from 5 cm
Telephoto camera–Leica 200 MP periscope, f/2.6, OIS, 100 mm equivalent focal length, 1/1.4-inch sensor and 2.24 µm binned pixels; second floating telephoto is 50 MP, f/1.8, OIS, 70 mm equivalent focal length, 1.4 µm binned pixels and macro focusing from 10 cm
Front camera32 MP, ƒ/2.45OmniVision OV32B, 32 MP, f/2.0, 21 mm equivalent focal length and 90° field of view
Zoom–3× floating telephoto and 4.3× periscope optical ratios identified by Tech Advisor and TechRadar; maker lists 23/70/100 mm focal lengths and up to 120× digital zoom
Video recording8K at 24 fps; 4K at 30 or 60 fps; 1080p at 30 or 60 fps; 720p at 30 fps; slow motion at 120, 240, 480, 960 or 1,920 fps8K at 30 fps; 4K at 30/60/120 fps; Full HD at 30/60 fps; HD at 30 fps; Dolby Vision and 4K60 10-bit log across focal lengths; 4K120 on main/periscope; slow motion HD or Full HD at 120/240/480/960/1,920 fps
Front video1080p at 30 or 60 fps; 720p at 30 fps; 720p slow motion at 120 fps4K or Full HD at 30/60 fps, HD at 30 fps; Dolby Vision video, teleprompter, slow motion selfie and time-lapse selfie
Camera features5 MP telemacro, ƒ/2.4, autofocus from 3–7 cm; ProFocus motion/eye tracking and motion capture, night modes, photo clones, timed burst, document mode, HDR and Google Lens; AI cinema, Ultra Night Video, Vlog, dual video and video log13-channel multispectral sensor, Leica Authentic and Vibrant styles, Leica filters, ProFocus motion and eye tracking, Lightning Burst, Dynamic Shots, master portraits from 23–135 mm, 50/200 MP modes, macro, Fastshot, Supermoon, RAW/DNG/HEIF/JPEG, 16-bit UltraRAW, Movie mode, ShootSteady, Dual Video and Ultra Night Video; Photography Kit Legend Edition sold separately
Battery and charging
Battery4,500 mAh5,410 mAh
Wired chargingUp to 67 WUp to 90 W
Wireless chargingUp to 50 WUp to 80 W
Battery life detail4,500 mAh typical; Xiaomi AdaptiveCharge5,410 mAh typical UK Xiaomi Surge Battery; maker laboratory claim of up to 25 hours video playback; Surge P3 charging and G2 battery-management chips
Wired charging67 W charger included90 W HyperCharge; QC3+, QC3.0, QC2.0, PD3.0, PD2.0 and MI FC 2.0; separate Xiaomi 90 W adaptor recommended
Wireless charging–80 W wireless HyperCharge; compatible wireless charger sold separately
Charges other devices10 W reverse wireless charging–
Design
TypeStandardStandard
Weight180 g226 g
Thickness8.16 mm9.35 mm
Height × width152.7 × 69.9 mm161.3 × 75.3 mm
Water and dust resistance–IP68
Materials–6M42 high-strength aluminium frame; maker confirms Silver Chrome glass fibre and PU leather; Tech Advisor identifies glass-fibre backs on Black/White
ColoursGrey, Blue and PurpleBlack, White and Silver Chrome; main dimensions and weight are for Black/White, while Silver Chrome is 9.48 mm thick and weighs 229 g
Water resistance detail–IP68; maker test in static freshwater at 1.5 m for 30 minutes with temperature difference no greater than 5 K; resistance can decline with wear; separate photography kit system rated IP54
BiometricsIn-screen fingerprint sensor and AI face unlockUltrasonic in-display fingerprint reader and AI Face Unlock
SensorsProximity, ambient light, accelerometer, gyroscope, compass, X-axis linear motor, IR blaster and flicker sensorProximity, ambient light, accelerometer, gyroscope, electronic compass, IR blaster, laser autofocus, barometer and flicker sensor; X-axis linear vibration motor
SpeakersStereo speakers; SOUND BY Harman Kardon and Dolby AtmosStereo speakers, Dolby Atmos, Hi-Res Audio and Hi-Res Wireless Audio
Microphones–Four-microphone array with directional/omnidirectional recording and Audio Zoom
Software
Operating systemAndroidAndroid
Software at launchMIUI 13 based on Android 12Xiaomi HyperOS 2; Android 15 confirmed by Tech Advisor and TechRadar
Software updates–Four Android version upgrades and six years of security updates reported at launch by Tech Advisor and TechRadar
AI features–Regional HyperAI writing, speech recognition, interpreter, search, dynamic wallpapers, creativity and image-editing tools, Google Gemini and Circle to Search; applicable features require internet access and updates
In the boxPhone, adapter, USB-C cable, SIM tool, protective case, quick start guide and warranty cardPhone, USB-C cable, SIM tool, protective case, safety information, quick-start guide, warranty card and desiccant; standard UK box excludes adaptor
Connectivity
Mobile network5G NSA/SA n1/3/5/7/8/20/28/38/40/41/66/77/78/79; LTE FDD B1/2/3/4/5/7/8/12/13/17/18/19/20/25/26/28/32/66 and TDD B38/39/40/41/42/48; WCDMA B1/2/4/5/6/8/19; GSM 850/900/1800/1900 MHz; 4×4 MIMO5G SA/NSA, LTE, UMTS and GSM; 4×4 MIMO; Xiaomi Surge T1/T1S tuners and antenna array
SIMDual SIM; availability varies by regionDual nano-SIM, nano-SIM plus eSIM or dual eSIM; eSIM depends on region and carrier
Wi-FiWi-Fi 6; Wi-Fi 6E availability varies by region and may require an OTA update; availability depends on the local networkWi-Fi 7/6E/6 capability depends on region and network; dual-band simultaneous operation, 2×2 MIMO, 8×8 sounding for MU-MIMO, Wi-Fi Direct and Miracast
BluetoothBluetooth 5.2Bluetooth 6.0, Dual-Bluetooth; SBC, AAC, aptX, aptX HD, aptX Adaptive, LDAC, LHDC 5.0 and LC3
NFCSupported; Google Pay availability varies by marketSupported
USBUSB-CUSB-C, USB 3.2 Gen 2
PositioningGPS L1/L5, Galileo E1/E5a, GLONASS G1, BeiDou and NavIC L5; A-GNSS, compass and network positioningGPS L1/L5, Galileo E1/E5a, GLONASS G1, BeiDou, QZSS L1/L5 and NavIC L5; assisted positioning

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