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OnePlus OnePlus 9 vs Xiaomi Mi 11

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

Better figure, where one is clearly better

OnePlusOnePlus 9XiaomiMi 11
Overview
ReleasedMarch 2021January 2021
Display
Screen size6.55″6.81″
Resolution2400 × 10803200 × 1440
Sharpness402 pixels per inch515 pixels per inch
PanelOLEDOLED
Refresh rate120 Hz120 Hz
Peak brightness1,100 nits1,500 nits
Display typeFlat Fluid AMOLED; 20:9 aspect ratioQuad-curved AMOLED with Gorilla Glass Victus.
Pixel density402 ppi–
Brightness detailUp to 1,100 nits; two ambient light sensors and 8,192 automatic brightness levels, stated in the maker's launch release–
Always-on displayAlways-on display with OxygenOS 11, described by TechAdvisor–
Screen protectionCorning Gorilla Glass; generation not specified in the maker's sheet–
Display features120 Hz; HDR10+; sRGB and Display P3; Comfort Tone, Reading Mode, Night Mode, Vibrant Color Effect and Ultra-high Video ResolutionAdaptiveSync at 30/60/90/120 Hz, 480 Hz touch sampling and 900 nits high-brightness mode; HDR10+ and 10-bit colour.
Performance
ChipSnapdragon 888Qualcomm Snapdragon 888
Memory8 GB – 12 GB8 GB
Storage128 GB, 256 GB128 GB, 256 GB
CPUQualcomm Snapdragon 888 with Snapdragon X60 5G modem5 nm Snapdragon 888 with Kryo 680 CPU; no unpublished CPU clock inferred.
GPUAdreno 660Adreno 660.
Storage typeLPDDR5 RAM; UFS 3.1 two-lane storage; UK 8/128 GB and 12/256 GB pairings confirmed by TechAdvisorLPDDR5 RAM and UFS 3.1 storage; no microSD expansion (Tech Advisor).
CoolingOnePlus Cool Play with thicker graphite layers and a larger vapour chamber–
Cameras
Main camera48 MP108 MP
Ultra wide camera50 MP13 MP
Telephoto cameraNoneNone
Optical zoomNoneNone
Front camera16 MP20 MP
Main cameraSony IMX689, 48 MP, 1/1.43-inch sensor, f/1.8, 23 mm equivalent, seven-element lens and 1.12 µm pixels; maker's sheet does not publish OIS and the reviews confirm its absencef/1.85, 1/1.33-inch sensor, optical stabilisation and four-pixel binning to 1.6 µm.
Ultra wide cameraSony IMX766, 50 MP, 1/1.56-inch sensor, f/2.2, 14 mm equivalent, seven-element freeform lensf/2.4 and 123° field of view.
Front cameraSony IMX471, 16 MP, f/2.4, 1.0 µm pixels, fixed focus and EIS–
ZoomDigital zoom; no dedicated telephoto camera–
Video recording8K at 30 fps; 4K and 1080p at 30 or 60 fps; slow motion at 1080p 240 fps or 720p 480 fps; time-lapse at 1080p or 4K 30 fps; video editorRear 8K at 24/30 fps, 4K at 30/60 fps and 1080p at 30/60 fps.
Front video1080p at 30 fps; time-lapsef/2.2 selfie camera; 1080p at 30 fps. Maker recording mode controls Tech Advisor's front HD60 claim.
Camera featuresHasselblad Camera for Mobile and Natural Color Calibration; additional 2 MP monochrome camera, all-pixel omnidirectional phase and contrast autofocus, dual LED flash, Nightscape, Super Macro, UltraShot HDR, Smart Scene Recognition, Portrait, Pro with 12-bit RAW, Panorama, Tilt-shift, focus peaking, pet focus, filters, Super Stable, Video Nightscape, Video HDR, video portrait, focus tracking and HyperlapseAdditional 5 MP f/2.4 autofocus telemacro camera, focusing at 3–10 cm; a close-up camera rather than optical distance zoom. Night and movie-effect modes.
Battery and charging
Battery4,500 mAh4,600 mAh
Wired chargingUp to 65 WUp to 55 W
Wireless chargingUp to 15 WUp to 50 W
Battery life detailNon-removable dual-cell battery; two 2,250 mAh cells equivalent to 4,500 mAh typical–
Wired chargingWarp Charge 65T, 10 V/6.5 A; maker reports 1–100% in 29 minutes under laboratory conditions; included adapter supports USB Power Delivery up to 45 W for other compatible devices55 W GaN charger included in the UK; maker laboratory claim of 45 minutes to full charge, with actual results varying.
Wireless charging15 W Qi wireless charging on the European model; regional variants differ50 W wireless and 10 W reverse wireless charging. Maker rates control Tech Advisor's swapped closing specification table.
Charges other devicesReverse wireless charging, described by Android Central; maker wattage not verified–
Design
TypeStandardStandard
Weight192 g196 g
Thickness8.7 mm8.06 mm
Height × width160 × 74.2 mm164.3 × 74.6 mm
MaterialsGlass back and plastic frame, described by TechRadarCurved glass back and Gorilla Glass Victus over the display.
ColoursArctic Sky, Astral Black and Winter Mist; UK Winter Mist is tied to 12/256 GB according to TechAdvisorHorizon Blue and Midnight Gray; maker pages also depict White and a textured-glass Lei Jun limited edition, without establishing UK availability of those editions.
ButtonsAlert Slider; gestures and on-screen navigation supported–
Water resistance detailNo published IP rating for the UK unlocked model; the separate US T-Mobile certification is not applied–
BiometricsIn-display fingerprint sensor and camera-based face unlockIn-display fingerprint sensor and AI face unlock; heart-rate monitoring was subject to an OTA update.
SensorsFingerprint sensor, accelerometer, electronic compass, gyroscope, ambient light, proximity, sensor core and flicker detection–
SpeakersDual stereo speakers; Dolby AtmosDual speakers tuned with Harman Kardon.
MicrophonesNoise cancellation support–
Software
Operating systemAndroidAndroid
Software at launchOxygenOS based on Android 11MIUI 12 based on Android 11.
Software updatesThree Android OS upgrades and four years of security updates from launch, reported by TechAdvisor; this is the original commitment, not a claim of continuing support–
In the boxPhone, Warp Charge 65 adapter, USB-C to USB-C cable, quick start guide, welcome letter, safety and warranty information, logo sticker, case, screen protector and SIM ejectorUK charger, USB-C cable, USB-C to 3.5 mm adapter, case, SIM tool and documents. Maker first-sale programme and contemporary Gizmochina coverage establish 1 January 2021 in China; the UK configurations above became available later.
Connectivity
Mobile networkSnapdragon X60; 4×4 MIMO, up to LTE Cat 20 download and Cat 18 upload, 2 Gbit/s and 200 Mbit/s subject to carrier; UK 5G NSA n1/n3/n5/n7/n8/n20/n28/n38/n40/n41/n66/n78 and SA n1/n3/n7/n28/n41/n78–
SIMDual nano-SIMDual SIM, with regional 5G band availability.
Wi-FiWi-Fi 6, 802.11 a/b/g/n/ac/ax; 2×2 MIMO on 2.4 and 5 GHzWi-Fi 6, as confirmed by both UK maker pages; Tech Advisor instead lists Wi-Fi 6E.
BluetoothBluetooth 5.2; aptX, aptX HD, LDAC and AACBluetooth 5.2.
NFCYesGoogle Pay support is market-dependent, as stated by the UK maker sheet.
USBUSB-C, USB 3.1 Gen 1; standard USB-C earphones supported; included cable supports USB 2.0USB-C; no 3.5 mm socket (TechRadar).
PositioningDual-band GPS L1/L5 and Galileo E1/E5a; GLONASS, BeiDou and A-GPS–

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