Samsung Galaxy S21 5G vs Xiaomi Redmi 8A
Samsung Galaxy S21 5G
Xiaomi Redmi 8A
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Network
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2G networkGSM 850, 900, 1800, 1900; CDMA 800, 1900 & TD-SCDMAGSM 850, 900, 1800, 1900
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3G networkHSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1xEV-DOHSDPA 850, 900, 1900, 2100
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4G networkLTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 38, 39, 40, 41, 46, 48, 66, 71LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 20(800), 38(2600), 40(2300) - global version; LTE frequency band 1(2100), 3(1800), 5(850), 8(900), 40(2300), 41(2500) - India; LTE frequency band 1(2100), 3(1800), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) - China
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5G network5G band SA/NSA/Sub6/mmWave-
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HSDPA speed42.2 Mbps-
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HSUPA speed5.76 Mbps-
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LTE speedLTE-A (CA), 2000 Mbps download, 200 Mbps upload-
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2021-012019-9
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Status2021-012019-9
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Design
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BuildGlass front (Gorilla Glass Victus), plastic back, aluminum frameFront glass, plastic body
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SIMSingle SIM (Nano-SIM and/or eSIM) or Dual SIM (Nano-SIM and/or eSIM, dual stand-by)Dual SIM (Nano-SIM, dual stand-by)
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Height151.7 mm156.5 mm
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Width71.2 mm75.4 mm
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Thickness7.9 mm9.4 mm
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Weight169 (Sub6) / 171 (mmWave) g188 g
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PaymentSamsung Pay (Visa, MasterCard certified)-
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WaterproofIP68 (1.5m and 30 mins)-
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Splash resistant-Yes
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Dust proofIP68-
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ColorsGray, Pink, Violet, WhiteBlack, Blue, Red
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Display
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Display typeDynamic AMOLED 2XIPS LCD capacitive touchscreen
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Physical size6.2 inches6.2 inches
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Resolution1080 x 2400 pixels720 x 1520 pixels
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Pixel density421 ppi271 ppi
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Display colors1677721616777216
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ProtectionScratch resistant, Corning Gorilla Glass VictusCorning Gorilla Glass 5
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Multitouch-Yes
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Display features120Hz, HDR10+, 1300 nits (peak), Infinity-O display, Always-On display-
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Hardware
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CPUOcta-coreOcta-core
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CPUSingle-core 2.9 GHz Cortex-X1Dual-core 1.95 GHz Cortex-A53
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CPU(second)Triple-core 2.80 GHz Cortex-A78Hexa-core 1.45 GHz Cortex-A53
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CPU(third)Quad-core 2.2 GHz Cortex-A55
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ChipsetExynos 2100Qualcomm SDM439 Snapdragon 439
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GPUMali-G78 MP14Adreno 505
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Internal storage128, 256 GB32 GB
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Memory RAM8 GB2, 3 GB
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Memory cardNomicroSD, microSDHC, microSDXC
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Memory card max-512 GB
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StorageUFS 3.XUFS 2.1
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OS
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OSAndroid 11, One UI 3.1MIUI 10 (Android 9.0 Pie)
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Main camera
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Camera typeTripleSingle
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Main camera(wide) , 12 MP, f/1.8 , 26 mm, 1/1.76" , 1.8 µm12 MP, f/1.8 , 1/2.55" , 1.4 µm
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(telephoto) , 64 MP, f/2.0 , 29 mm, 1/1.72" , 0.8 µm, 1.1x optical zoom , 3x hybrid zoom
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120˚ , (ultrawide) , 12 MP, f/2.2 , 13 mm, 1/2.55" , 1.4 µm
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Primary camera resolution4032 x 3024 pixels-
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Primary camera video8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS1080p@30fps
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Primary camera flashLED flashLED flash
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Camera featuresAutofocus, continuous shooting, digital zoom, optical zoom, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocusHDR
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DxOMark photo123-
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DxOMark zoom77-
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DxOMark video93-
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DxOMark camera score116-
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Selfie camera
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Selfie camera(wide) , 10 MP, f/2.2 , 80˚ , 26 mm, 1/3.24" , 1.22 µm8 MP, f/2.0 , 1.12 µm
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Selfie camera resolution3648 x 2736 pixels-
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Selfie camera featuresAutofocus, HDR, phase detection autofocus-
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Selfie camera video4K@30/60fps, 1080p@30fps1080p@30fps
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DxOMark photo100-
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DxOMark video95-
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DxOMark camera score98-
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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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Connectivity
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WLANWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ax, 6EWi-Fi 802.11b, 802.11g, 802.11n
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WLAN WiFi HotspotYesYes
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WLAN WiFi DirectYesYes
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WLAN WiFi Dual BandYes-
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USBType-C 3.2Type-C reversible connector
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USB On-The-GoYesYes
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Bluetoothv5.0v4.2
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Bluetooth A2DPYesYes
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bluetooth LEYesYes
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Infrared-Yes
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NFCYes-
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GPSYes, with A-GPSYes, with A-GPS
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GLONASSYesYes
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GALILEOYes-
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Beidou-Yes
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BDSYes-
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Features
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SensorsAccelerometer, barometer, compass, fingerprint, gyroscope, proximityAccelerometer, compass, proximity
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Browser
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HTMLHTML5HTML5
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Battery
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Battery typeLi-IonLi-Po
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Battery capacity4000 mAh5000 mAh
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Battery removableNon-removableNon-removable
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Fast battery chargingYesYes
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Wireless reverse chargingYes-
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Fast wireless chargingQi/PMA-
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Tests and performance
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Antutu677991 (v8)-
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Geekbench(single-core)828 (v5.2)-
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Geekbench(multi-core)2897 (v5.2)-
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SAR value
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SAR(head)0.74 W/kg-
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SAR(body)1.08 W/kg-
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SAR EU(head)0.46 W/kg-
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SAR EU(body)1.51 W/kg-
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Cost
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Price800 USD110 USD
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Multimedia
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Radio-FM Radio