Xiaomi Redmi K40 Pro vs vivo Y21a
Xiaomi Redmi K40 Pro
vivo Y21a
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Network
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2G networkGSM 850, 900, 1800, 1900; CDMA 800GSM 850, 900, 1800, 1900
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3G networkHSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1xHSDPA 850, 900, 2100
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4G networkLTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42LTE frequency band 1, 3, 5, 8, 38, 40, 41
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5G network5G band 1, 3, 28, 41, 77, 78 SA/NSA/Sub6-
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HSDPA speed42.2 Mbps42.2 Mbps
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HSUPA speed5.76 Mbps5.76 Mbps
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EV-DO speed-EV-DO Rev.A 3.1 Mbps download, 1.8 Mbps upload
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LTE speedLTE-A, 1174 Mbps download, 210 Mbps uploadLTE, 301 Mbps download, 151 Mbps upload
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GPRSYesYes
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EDGEClass 8Yes
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Availability
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Status2021-032022-01
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Oficially announced2021-022022-01
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Design
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BuildGlass, MetalGlass front, plastic frame, plastic back
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SIMDual SIM (Nano-SIM, dual stand-by)Dual SIM (Nano-SIM, dual stand-by)
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Height163.7 mm164.3 mm
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Width76.4 mm76.1 mm
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Thickness7.8 mm8 mm
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Weight196 g182 g
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Splash resistantIP53-
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Dust proofIP53-
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ColorsAurora, Black, WhiteBlue, Diamond Glow
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Display
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Display typeSuper AMOLEDIPS LCD
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Physical size6.67 inches6.51 inches
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Resolution1080 x 2400 pixels720 x 1600 pixels
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Pixel density395 ppi270 ppi
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Display colors1677721616777216
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ProtectionScratch resistant, 3D curved glass screen, Corning Gorilla Glass 5-
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Display features120Hz, HDR10+, 1300 nits (peak), sunscreen 3.0, night light screen-
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Hardware
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CPUOcta-core-
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CPUSingle-core 2.84 GHz Kryo 680Octa-core 2.0 GHz Cortex-A53
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CPU(second)Triple-core 2.42 GHz Kryo 680
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CPU(third)Quad-core 1.80 GHz Kryo 680
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ChipsetQualcomm SM8350 Snapdragon 888Mediatek MT6762 Helio P22
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GPUAdreno 660Mali-G52 MC2
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Memory RAM6, 8 GB4 GB
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Internal storage128, 256 GB64 GB
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Memory cardNomicroSD, microSDHC, microSDXC
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Memory card max-1 TB
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StorageUFS 3.1-
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OS
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OSAndroid 11, MIUI 12Android 11, Funtouch 11.1
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Main camera
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Camera typeTripleDual
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Main camera(wide) , 64 MP, f/1.9 , 26 mm, 1/1.7" , 0.8 µm(wide) , 13 MP, f/2.2
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(ultrawide) , 8 MP, f/2.2 , 119˚(macro) , 2 MP, f/2.4
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(macro) , 5 MP, 50 mm, 1/5.0" , 1.12 µm
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Primary camera resolution9280 x 6920 pixels4160 x 3120 pixels
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Primary camera video8K@30fps, 4K@30/60fps, 1080p@30/60/120/240/960fps, gyro-EIS, HDR10+1080p@30fps
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Primary camera flashLED flashLED flash
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Camera featuresAutofocus, continuous shooting, digital zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocusAutofocus, continuous shooting, digital zoom, digital image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro-mode, phase detection autofocus
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Selfie camera
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Selfie camera typeSingleSingle
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Selfie camera(wide) , 20 MP, 1/3.4" , 0.8 µm(wide) , 8 MP, f/1.8
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Selfie camera resolution5184 x 3880 pixels3264 x 2448 pixels
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Selfie camera featuresFace unlock, HDRFace unlock
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Selfie camera video1080p@30fps, 720p@120fps1080p@30fps
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Sound
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3.5mm jackNoYes
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LoudspeakerYes, with stereo speakersYes
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EarpieceYesYes
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Multimedia
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RadioNoFM Radio
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Connectivity
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WLANWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11axWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac
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WLAN WiFi HotspotYesYes
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WLAN WiFi DirectYesYes
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WLAN WiFi Dual BandYesYes
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USBType-C 2.0Type-C 2.0
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USB On-The-GoYesYes
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Bluetoothv5.2v5.0
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Bluetooth A2DPYesYes
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bluetooth LEYesYes
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InfraredYes-
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NFCYesNo
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GPSYes, with dual-band A-GPSYes, with A-GPS
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GLONASSYesYes
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GALILEOYesYes
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BDSYesYes
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QZSSYes-
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NavICYes-
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Features
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SensorsAccelerometer, barometer, color spectrum, compass, fingerprint, gyroscope, proximityAccelerometer, compass, fingerprint, proximity
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Browser
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HTMLHTML5HTML5
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Battery
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Battery typeLi-PoLi-Po
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Battery capacity4520 mAh5000 mAh
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Battery removableNon-removableNon-removable
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Fast battery chargingQuick Charge 3.0 (100% in 52 min)Quick Charge, 18W
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Reverse charging-Yes
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Tests and performance
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Antutu727466 (v8)90180 (v8)
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Geekbench(single-core)1132 (v5.2)363 (v5.2)
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Geekbench(multi-core)3847 (v5.2)1353 (v5.2)
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Cost
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Price580 USD190 USD