Samsung Galaxy S21 Ultra 5G vs Xiaomi Redmi Note 7S
Samsung Galaxy S21 Ultra 5G
Xiaomi Redmi Note 7S
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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), 3(1800), 5(850), 8(900), 40(2300), 41(2500)
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5G network5G band SA/NSA/Sub6/mmWave-
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HSDPA speed42.2 Mbps42 Mbps
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HSUPA speed5.76 Mbps5.76 Mbps
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LTE speedLTE-A (CA), 2000 Mbps download, 200 Mbps uploadLTE Cat 18, 1.2 Gbps download, 221 Mbps upload
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2021-012019-5
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Status2021-012019-5
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Design
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BuildGlass front (Gorilla Glass Victus), glass back (Gorilla Glass), aluminum frameGlass, plastic
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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/microSD)
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Height165.1 mm159.21 mm
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Width75.6 mm75.21 mm
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Thickness8.9 mm8.1 mm
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Weight227 (Sub6) / 229 (mmWave) g186 g
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PaymentSamsung Pay (Visa, MasterCard certified)-
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WaterproofIP68 (1.5m and 30 mins)-
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Dust proofIP68-
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ColorsBlack, Brown, Silver, Navy, TitaniumBlack, Blue, Red
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Display
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Display typeDynamic AMOLED 2XIPS capacitive touchscreen
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Physical size6.8 inches6.3 inches
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Resolution1440 x 3200 pixels1080 x 2340 pixels
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Pixel density515 ppi409 ppi
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Display colors1677721616777216
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ProtectionScratch resistant, Corning Gorilla Glass Victus2.5D curved glass screen, Scratch resistant, Corning Gorilla Glass 5, LTPS (Low Temperature PolySilicon)
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Multitouch-Yes
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Display features120Hz, HDR10+, 1500 nits (peak), Infinity-O display, Always-On display-
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DxOMark display score91-
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Hardware
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CPUOcta-coreOcta-core
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CPUSingle-core 2.9 GHz Cortex-X1Quad-core 2.2 GHz Kryo 260
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CPU(second)Triple-core 2.80 GHz Cortex-A78quad-core 1.84 GHz Kryo 260
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CPU(third)Quad-core 2.2 GHz Cortex-A55
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ChipsetExynos 2100Qualcomm Snapdragon 660 MSM8976 Plus
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GPUMali-G78 MP14Adreno 512
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Memory RAM12, 16 GB3, 4 GB
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Internal storage128, 256, 512 GB32, 64 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 11, One UI 3.1MIUI V10.2 (Android 9.0 Pie)
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Main camera
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Camera typeQuadDual
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Main camera(wide) , 108 MP, f/1.8 , 26 mm, 1/1.33" , 0.8 µm48 MP, f/1.8 , 1/2" , 0.8 µm
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(periscope telephoto) , 10 MP, f/4.9 , 1/3.24" , 1.22 µm, 10x optical zoom5 MP, f/2.2 , 1.12 µm
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(telephoto) , 10 MP, f/2.4 , 70 mm, 1/3.24" , 1.22 µm, 3x optical zoom
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(ultrawide) , 12 MP, f/2.2 , 13 mm, 1/2.55" , 1.4 µm
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Primary camera resolution12000 x 9000 pixels8000 x 6000 pixels
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Primary camera video8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS1080p@120fps
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Primary camera flashLED flashdual LED 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 autofocus, laser 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, RAW, phase detection
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DxOMark photo128-
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DxOMark zoom76-
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DxOMark video98-
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DxOMark camera score121-
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Selfie camera
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Selfie camera(wide) , 40 MP, f/2.2 , 80˚ , 26 mm, 1/2.8" , 0.7 µm13 MP, f/2 , 28 mm, 0.23" , 1.124 µm
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Selfie camera resolution7968 x 5480 pixels4224 x 3136 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 photo105-
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DxOMark video93-
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DxOMark camera score100-
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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 802.11a, 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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Wi-Fi display-Yes
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WLAN WiFi Dual BandYesYes
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USBType-C 3.2Type-C reversible connector
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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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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, fingerprint, gyroscope, light, 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 capacity5000 mAh4000 mAh
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Battery removableNon-removableNon-removable
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Fast battery chargingYesQualcomm Quick Charge 4.0
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Wireless reverse chargingYes-
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Fast wireless chargingQi/PMA-
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Talk time 2G-23 h
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Talk time 3G-23 h
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Standby time 2G-251 h
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Standby time 3G-251 h
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DxOMark autonomy48-
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DxOMark charging74-
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DxOMark efficiency53-
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DxOMark battery score57-
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Tests and performance
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Antutu677991 (v8)-
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Geekbench(single-core)1096 (v5.2)-
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Geekbench(multi-core)3723 (v5.2)-
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SAR value
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SAR(head)0.77 W/kg-
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SAR(body)1.02 W/kg-
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SAR EU(head)0.71 W/kg-
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SAR EU(body)1.58 W/kg-
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Cost
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Price1200 USD-
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Multimedia
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Radio-Yes