Xiaomi Redmi K40S vs Xiaomi Redmi Note 8 2021
Xiaomi Redmi K40S
Xiaomi Redmi Note 8 2021
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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
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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-A, Cat12, 301 Mbps download, 150 Mbps upload
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2022-032021-05
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Status2022-032021-05
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Design
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BuildGlass front (Gorilla Glass 5), plastic backGlass front (Gorilla Glass 5), glass back (Gorilla Glass 5), plastic frame
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SIMDual SIM (Nano-SIM, dual stand-by)Dual SIM (Nano-SIM, dual stand-by)
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Height163.2 mm158.3 mm
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Width76 mm75.3 mm
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Thickness7.7 mm8.4 mm
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Weight195 g190 g
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Splash resistantYes-
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ColorsBlack, Blue, Gray, GreenBlack, Blue, White
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Display
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Display typeAMOLEDIPS LCD
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Physical size6.67 inches6.3 inches
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Resolution1080 x 2400 pixels1080 x 2340 pixels
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Pixel density395 ppi409 ppi
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Display colors1677721616777216
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ProtectionScratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 5Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 5
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Display features120Hz, HDR10+, 1300 nits (peak)500 nits (typ)
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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 Helio G85
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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 GB64, 128 GB
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Memory cardNomicroSD, microSDHC, microSDXC
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Memory card max-256 GB
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StorageUFS 3.1eMMC 5.1
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OS
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OSAndroid 12, MIUI 13Android 11, MIUI 12.5
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Main camera
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Camera typeTripleQuad
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Main camera(wide) , 48 MP, f/1.8 , 1/2" , 0.8 µm(wide) , 48 MP, f/1.8 , 1/2.0" , 0.8 µm, 26 mm
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(ultrawide) , 8 MP, 119˚(ultrawide) , 8 MP, 120˚ , f/2.2 , 1/4.0" , 1.12 µm
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(macro) , 2 MP, f/2.4(macro) , 2 MP, f/2.4
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(depth) , 2 MP, f/2.4
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Primary camera resolution8000 x 6000 pixels8000 x 6000 pixels
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Primary camera video4K@30fps, 1080p@30/60/120fps, 720p@960fps; gyro-EIS1080p@30/120fps; gyro-EIS
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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, 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) , 13 MP, f/2.0 , 1/3.1" , 1.12 µm
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Selfie camera resolution-4224 x 3136 pixels
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Selfie camera featuresFace unlock, HDRFace unlock
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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, with stereo speakers
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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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Bluetoothv5.2v5.2
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Bluetooth A2DPYesYes
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bluetooth LEYesYes
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Infrared-Yes
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NFCYesNo
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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, gyroscope, 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 mAh4000 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 4.0
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Tests and performance
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Antutu715000 (v9)200000 (v8)
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Geekbench(single-core)983 (v5.2)351 (v5.2)
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Geekbench(multi-core)3362 (v5.2)1256 (v5.2)
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Cost
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Price290 USD140 USD
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