Samsung Galaxy A51 vs Xiaomi Redmi Note 7S
Samsung Galaxy A51
Xiaomi Redmi Note 7S
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Network
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2G networkGSM 850, 900, 1800, 1900GSM 850, 900, 1800, 1900
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3G networkHSDPA 850, 900, 1700(AWS), 1900, 2100HSDPA 850, 900, 1900, 2100
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4G networkLTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 20(800), 26(850), 28(700), 38(2600), 40(2300), 41(2500), 66(1700/2100)LTE frequency band 1(2100), 3(1800), 5(850), 8(900), 40(2300), 41(2500)
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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, Cat12, 603 Mbps download, 102 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 announced2019-122019-5
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Status2019-122019-5
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Design
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BuildFront glass, plastic bodyGlass, plastic
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SIMSingle SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)Dual SIM (Nano-SIM/microSD)
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Height158.5 mm159.21 mm
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Width73.6 mm75.21 mm
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Thickness7.9 mm8.1 mm
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Weight172 g186 g
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ColorsBlack, Blue, Pink, WhiteBlack, Blue, Red
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Display
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Display typeSuper AMOLED capacitive touchscreenIPS capacitive touchscreen
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Physical size6.5 inches6.3 inches
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Resolution1080 x 2400 pixels1080 x 2340 pixels
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Pixel density405 ppi409 ppi
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Display colors1677721616777216
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ProtectionScratch resistant, Corning Gorilla Glass 32.5D curved glass screen, Scratch resistant, Corning Gorilla Glass 5, LTPS (Low Temperature PolySilicon)
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MultitouchYesYes
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Hardware
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CPUOcta-coreOcta-core
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CPUQuad-core 2.3 GHz Cortex-A73Quad-core 2.2 GHz Kryo 260
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CPU(second)quad-core 1.7 GHz Cortex-A53quad-core 1.84 GHz Kryo 260
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ChipsetExynos 9611Qualcomm Snapdragon 660 MSM8976 Plus
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GPUMali-G72 MP3Adreno 512
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Memory RAM4, 6 GB3, 4 GB
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Internal storage64, 128 GB32, 64 GB
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Memory cardmicroSD, microSDHC, microSDXCmicroSD, microSDHC, microSDXC
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Memory card max1 TB256 GB
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Storage-eMMC 5.1
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OS
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OSOne UI 2 (Android 10.0)MIUI V10.2 (Android 9.0 Pie)
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Main camera
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Camera typeQuadDual
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Main camera48 MP, f/2.0 , 26 mm, 1/2" , 0.8 µm48 MP, f/1.8 , 1/2" , 0.8 µm
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12 MP, f/2.2 , 13 mm, 1.12 µm5 MP, f/2.2 , 1.12 µm
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5 MP, f/2.4 , 40 mm
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5 MP, f/2.2 , 1/5.0" , 1.12 µm
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Primary camera resolution8000 x 6000 pixels8000 x 6000 pixels
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Primary camera video2160p@30fps, 1080p@30/60/120fps1080p@120fps
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Primary camera flashLED flashdual LED flash
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Camera featuresAutofocus, 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, 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, RAW, phase detection
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Selfie camera
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Selfie camera32 MP, f/2.2 , 26 mm, 1/2.8" , 0.8 µm13 MP, f/2 , 28 mm, 0.23" , 1.124 µm
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Selfie camera resolution6560 x 4928 pixels4224 x 3136 pixels
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Selfie camera video1080p@30fps1080p@30fps
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Sound
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3.5mm jackYesYes
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LoudspeakerYesYes
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EarpieceYesYes
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Multimedia
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RadioFM RadioYes
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Connectivity
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WLANWi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11acWi-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 displayYesYes
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WLAN WiFi Dual BandYesYes
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USBType-C 1.0 reversible connectorType-C reversible connector
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USB On-The-GoYesYes
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Bluetoothv5.0v5.0
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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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BeidouYesYes
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Features
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SensorsAccelerometer, compass, fingerprint, gyroscope, light, proximity, in-display fingerprint sensorAccelerometer, 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-PoLi-Po
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Battery capacity4000 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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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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Cost
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Price315 USD-