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vivo V21 5G vs Xiaomi POCO F3

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

Better figure, where one is clearly better

vivoV21 5GXiaomiPOCO F3
Overview
ReleasedMay 2021March 2021
Display
Screen size6.44″6.67″
Resolution2404 × 10802400 × 1080
Sharpness409 pixels per inch395 pixels per inch
PanelOLEDOLED
Refresh rate90 Hz120 Hz
Peak brightness800 nits1,300 nits
Display typeE3 AMOLED; current global parameter sheet lists 2,404 × 1,080 pixels, whereas the reviews list 2,400 × 1,080AMOLED DotDisplay, 20:9 aspect ratio and 5,000,000:1 contrast
Brightness detail500 nits typical, 800 nits HBM900 nits HBM and 1,300 nits peak
Screen protection–Corning Gorilla Glass 5
Always-on displayAlways-on display, TechAdvisor–
Display featuresHDR10+, 6,000,000:1 contrast; 60 Hz default with Smart Switch, 60 Hz and 90 Hz settings; some applications remain at 60 HzHDR10+, 360 Hz touch sampling, sunlight display 3.0, 360° ambient light sensing, MEMC, SGS Eye Care Display and Seamless Pro 120 Hz certification
Performance
ChipMediaTek Dimensity 800UQualcomm Snapdragon 870
Memory8 GB6 GB – 8 GB
Storage128 GB, 256 GB128 GB, 256 GB
CPU7 nm octa-core processor, up to 2.4 GHz7 nm Kryo 585 octa-core processor at up to 3.2 GHz
GPU–Adreno 650
Storage typeUFS 2.2; 8 GB physical RAM with 128 GB or 256 GB storage globally; global overview describes 3 GB extended RAM from storage, current India overview describes 4 GB; UK 128 GB model identified by TechAdvisor and TechRadarLPDDR5 RAM and UFS 3.1 storage; no microSD slot, as confirmed by Android Authority
Cameras
Main camera64 MP48 MP
Ultra wide camera8 MP8 MP
Telephoto cameraNoneNone
Optical zoomNoneNone
Front camera44 MP20 MP
Main cameraAutofocus, f/1.79, four-axis OIS48 MP, f/1.79 and 4-in-1 binning to 1.6 µm
Ultra wide cameraf/2.2, 120° lens angle or 108° after distortion correction8 MP, f/2.2 and 119° field of view
Front cameraAutofocus, f/2.0, OIS and dual Selfie Spotlight lights; 44 MP output in 16:11 mode only20 MP, f/2.45
Video recordingRear 4K at 30 fps and 1080p at 60 fps, TechAdvisor; maker says OIS and EIS are unavailable in 4K at 30 fps4K at 30 fps, Full HD at 30/60 fps and HD at 30 fps; HD and Full HD slow motion at 120/240/960 fps
Front video4K at 30 fps without OIS or EIS; Ultra Stable Selfie Video–
Camera features2 MP f/2.4 macro camera with 4 cm focus distance; eye autofocus, night portrait, dual-view video, double exposure and multi-style portraitAdditional 5 MP f/2.4 telemacro camera with autofocus at 3–7 cm; night mode 2.0 and selfie night mode; AI cinema modes include Magic Zoom, slow shutter, time freeze, night time-lapse, parallel world and freeze frame
Battery and charging
Battery4,000 mAh4,520 mAh
Wired chargingUp to 33 WUp to 33 W
Wireless chargingNoneNone
Battery life detailTypical capacity4,520 mAh typical
Wired charging11 V/3 A FlashCharge adapter; up to 63% in 30 minutes in maker laboratory tests at 25℃ ±1℃, starting at 1% with screen off; actual charging power varies33 W fast charging
Wireless chargingNo wireless charging, TechAdvisor–
Design
TypeStandardStandard
Weight176 g196 g
Thickness7.29 mm7.8 mm
Height × width159.68 × 73.9 mm163.7 × 76.4 mm
MaterialsAG matte glass back and flat frame; maker glass description differs from TechAdvisor's plastic-back descriptionGlass front and back with plastic frame, as described by Android Authority
ColoursDusk Blue at 176 g and 7.29 mm; Sunset Dazzle and Arctic White at 177 g and 7.39 mm; UK maker release lists Dusk Blue and Sunset DazzleMoonlight Silver, Deep Ocean Blue, Arctic White and Night Black
BiometricsIn-display fingerprint scanningSide fingerprint reader and AI Face Unlock
SensorsAccelerometer, ambient light sensor, e-compass, proximity sensor and gyroscopeProximity, ambient light, accelerometer, gyroscope, compass and IR blaster; X-axis linear vibration motor
SpeakersSingle speaker, TechAdvisorStereo speakers, Hi-Res Audio, Dolby Atmos enabled by later OTA and HDR10 video support; no headphone socket, as confirmed by Android Authority
Software
Operating systemAndroidAndroid
Software at launchFuntouch OS 11.1; Android 11 identified by both reviewsMIUI 12 for POCO based on Android 11, as reported by both reviews
In the boxPhone, headset, documentation, USB-C cable, power adapter, earphone jack adapter, SIM eject tool, case and applied protective film; accessories vary by regionPhone, power adaptor, USB-C cable, USB-C to 3.5 mm adaptor, protective case, SIM tool, user guide and warranty card
Connectivity
Mobile networkGlobal bands GSM B2/3/5/8; WCDMA B1/2/4/5/8; LTE FDD B1/2/3/4/5/7/8/20/28, TDD B38/39/40/41F as printed by maker; 5G n1/3/7/28/41/78; SA and NSA subject to carrier and softwareDual-SIM 5G; n1/n3/n5/n7/n8/n20/n28/n38/n41/n77/n78; LTE FDD B1/B2/B3/B4/B5/B7/B8/B12/B17/B20/B28/B66 and TDD B38/B40/B41; WCDMA B1/B2/B4/B5/B8 and GSM 850/900/1800/1900 MHz
SIMHybrid slot for one nano-SIM plus a second nano-SIM or microSD card; dual standby; 5G + 5G dual SIM on NSA networks onlyDual SIM; maker specification controls TechAdvisor's conflicting single-SIM description
Wi-Fi2.4 GHz and 5 GHz; Wi-Fi 5 identified by TechAdvisorWi-Fi 6
BluetoothBluetooth 5.1Bluetooth 5.1
NFCSupported in Europe, Saudi Arabia, UAE, South Africa, Hong Kong, Taiwan and Singapore; NFC-eSE in Indonesia; other regions not confirmed by global sheetNFC with Google Pay; availability varies by region
USBUSB-C with OTG; no 3.5 mm headphone socket, TechAdvisorUSB-C, as confirmed by Android Authority
PositioningGPS, BeiDou, Galileo and GLONASSGPS L1/L5, Galileo E1/E5a, GLONASS G1, BeiDou B1I/B2a and NavIC

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