Samsung Galaxy S21 Ultra 5G vs Xiaomi Redmi K30
Samsung Galaxy S21 Ultra 5G
Xiaomi Redmi K30
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Network
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2G networkGSM 850, 900, 1800, 1900; CDMA 800, 1900 & TD-SCDMAGSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
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3G networkHSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1xEV-DOHSDPA 850, 900, 2100; CDMA2000 1xEV-DO
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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), 34(2000), 38(2600), 39(1900), 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-A
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GPRSYesYes
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EDGEYesYes
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Availability
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Oficially announced2021-012019-12
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Status2021-012019-12
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Design
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BuildGlass front (Gorilla Glass Victus), glass back (Gorilla Glass), aluminum frameAluminium alloy, glass
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SIMSingle SIM (Nano-SIM and/or eSIM) or Dual SIM (Nano-SIM and/or eSIM, dual stand-by)Hybrid Dual SIM (Nano-SIM, dual stand-by)
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Height165.1 mm165.3 mm
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Width75.6 mm76.6 mm
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Thickness8.9 mm8.8 mm
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Weight227 (Sub6) / 229 (mmWave) g208 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, TitaniumBlue, Purple, Red
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Display
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Display typeDynamic AMOLED 2XIPS LCD capacitive touchscreen
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Physical size6.8 inches6.67 inches
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Resolution1440 x 3200 pixels1080 x 2400 pixels
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Pixel density515 ppi395 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, Oleophobic coating
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Multitouch-Yes
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Display features120Hz, HDR10+, 1500 nits (peak), Infinity-O display, Always-On displayHDR10, 120Hz sampling rate
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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-X1Dual-core 2.2 GHz Kryo 470 Gold
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CPU(second)Triple-core 2.80 GHz Cortex-A78Hexa-core 1.8 GHz Kryo 470 Silver
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CPU(third)Quad-core 2.2 GHz Cortex-A55
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ChipsetExynos 2100Qualcomm SDM730 Snapdragon 730G
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GPUMali-G78 MP14Adreno 618
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Memory RAM12, 16 GB6, 8 GB
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Internal storage128, 256, 512 GB64, 128, 256 GB
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Memory cardNomicroSD, microSDHC, microSDXC
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Memory card max-256 GB
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StorageUFS 3.1UFS 2.1
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OS
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OSAndroid 11, One UI 3.1MIUI V11 (Android 10.0)
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Main camera
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Camera typeQuadQuad
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Main camera(wide) , 108 MP, f/1.8 , 26 mm, 1/1.33" , 0.8 µm64 MP, f/1.9 , 26 mm, 1/1.7" , 0.8 µm
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(periscope telephoto) , 10 MP, f/4.9 , 1/3.24" , 1.22 µm, 10x optical zoom8 MP, f/2.2 , 1/4" , 1.12 µm, 13 mm
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(telephoto) , 10 MP, f/2.4 , 70 mm, 1/3.24" , 1.22 µm, 3x optical zoom2 MP, f/2.4 , 1/5" , 1.75 µm
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(ultrawide) , 12 MP, f/2.2 , 13 mm, 1/2.55" , 1.4 µm2 MP, f/2.4 , 1/5" , 1.75 µm
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Primary camera resolution12000 x 9000 pixels9248 x 6944 pixels
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Primary camera video8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS2160p@30fps, 1080p@30/120fps, 720p@960fps
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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, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, phase detection autofocus
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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 type-Dual
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Selfie camera(wide) , 40 MP, f/2.2 , 80˚ , 26 mm, 1/2.8" , 0.7 µm20 MP, f/2.2 , 27 mm, 1/3.4" , 0.8 µm
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2 MP, f/2.4 , 1/5" , 1.75 µm
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Selfie camera resolution7968 x 5480 pixels5963 x 3354 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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NFCYesYes
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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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Beidou-Yes
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BDSYes-
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Features
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SensorsAccelerometer, barometer, compass, fingerprint, gyroscope, proximityAccelerometer, barometer, compass, geomagnetic, gravity, gyroscope, pedometer, proximity, light, side-mounted fingerprint sensor
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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 mAh4500 mAh
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Battery removableNon-removableNon-removable
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Fast battery chargingYesYes(100% in 68 min)
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Wireless reverse chargingYes-
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Fast wireless chargingQi/PMA-
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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 USD245 USD
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Multimedia
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Radio-FM Radio
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