Xiaomi Redmi K40S vs vivo Y21s
Xiaomi Redmi K40S
vivo Y21s
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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, 1700(AWS), 1900, 2100
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4G networkLTE frequency band 1, 2, 3, 4, 5, 8, 18, 19, 26, 34, 38, 39, 40, 41, 42LTE frequency band 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41, 66; 1, 3, 5, 8, 40
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5G network5G band 1, 3, 5, 8, 28, 38, 40, 41, 77, 78 SA/NSA-
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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-ALTE, Cat4, 150 Mbps download, 51 Mbps upload
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2022-032021-09
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Status2022-032021-09
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Design
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BuildGlass front (Gorilla Glass 5), plastic backPlastic
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SIMDual SIM (Nano-SIM, dual stand-by)Dual SIM (Nano-SIM, dual stand-by)
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Height163.2 mm164.3 mm
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Width76 mm76.1 mm
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Thickness7.7 mm8 mm
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Weight195 g182 g
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Splash resistantYes-
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ColorsBlack, Blue, Gray, GreenBlue, White
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Display
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Display typeAMOLEDIPS 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, 2.5D curved glass screen, Corning Gorilla Glass 5-
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Display features120Hz, HDR10+, 1300 nits (peak)-
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Hardware
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CPUOcta-coreOcta-core
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CPUSingle-core 3.2 GHz Kryo 585Dual-core 2.0 GHz Cortex-A75
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CPU(second)Triple-core 2.42 GHz Kryo 585Hexa-core 1.8 GHz Cortex-A55
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CPU(third)Quad-core 1.80 GHz Kryo 585
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ChipsetQualcomm SM8250-AC Snapdragon 870 5GMediatek MT6769V/CU Helio G80
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GPUAdreno 650Mali-G52 MC2
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Memory RAM6, 8, 12 GB4 GB
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Internal storage128, 256 GB128 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 12, MIUI 13Android 11, Funtouch 11.1
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Main camera
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Camera typeTripleTriple
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Main camera(wide) , 48 MP, f/1.8 , 1/2" , 0.8 µm(wide) , 50 MP, f/1.8 , 24 mm
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(ultrawide) , 8 MP, 119˚(macro) , 2 MP, f/2.4
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(macro) , 2 MP, f/2.4(depth) , 2 MP, f/2.4
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Primary camera resolution8000 x 6000 pixels-
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Primary camera video4K@30fps, 1080p@30/60/120fps, 720p@960fps; gyro-EIS1080p@30fps
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Primary camera flashdual-LED dual-tone flashLED flash
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Camera featuresAutofocus, continuous shooting, digital zoom, optical 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(wide) , 8 MP, f/2.0
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Selfie camera resolution-3264 x 2448 pixels
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Selfie camera featuresFace unlock, HDR-
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Selfie camera video1080p@30/120fps1080p@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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NFCYesYes (market dependent)
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GPSYes, with 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, 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 capacity4500 mAh5000 mAh
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Battery removableNon-removableNon-removable
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Fast battery chargingQuick Charge 3+, 67W (100% in 38 min)Quick Charge, 18W
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Reverse charging-Yes
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Tests and performance
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Antutu715000 (v9)205000 (v8)
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Geekbench(single-core)983 (v5.2)363 (v5.2)
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Geekbench(multi-core)3362 (v5.2)1353 (v5.2)
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Cost
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Price290 USD170 USD
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SAR value
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SAR(head)-0.83 W/kg
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SAR(body)-1.09 W/kg