Samsung Galaxy A51 5G vs Samsung Galaxy A21s vs Samsung Galaxy A42 5G

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          General Info

          Manufacturer
          Samsung Samsung Samsung
          Announced
          April 2020 Expected Announcement - May 2020 2020, September 02
          Status
          Coming Soon - April 2020 Rumored Available. Released 2020, November 11
          Colors
          Prism Cube Black, Prism Cube White, Prism Cube Pink Black, White, Blue Prism Dot Black, Prism Dot White, Prism Dot Gray
          Form Factor
          Candybar Candybar Candybar
          Dimension
          158.9 x 73.6 x 8.7 mm
          (6.26 x 2.9 x 0.34 in)
          8.9 mm thickness
          (0.35 in thickness)
          164.4 x 75.9 x 8.6 mm
          (6.47 x 2.99 x 0.34 in)
          Weight
          187 g (6.6 oz) 191 g (6.74 oz) 193 g (6.81 oz)
          SIM Type
          Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by) Single SIM (Nano-SIM), Dual SIM (Nano-SIM, dual stand-by)
          2G Network
          GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only)
          3G Network
          HSDPA 850 / 900 / 1900 / 2100
          HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
          HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
          4G Network
          LTE 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 1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 38, 40, 41 - Europe
          1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 28, 34, 38, 39, 40, 41
          5G Network
          5G SA/NSA - 1, 3, 5, 7, 8, 28, 40, 41, 78 SA/NSA/Sub6 - Europe
          1, 3, 5, 7, 8, 28, 40, 41, 78, 79 SA/NSA/Sub6
          Messaging
          Build Features
          - Fingerprint Sensor (under display, optical)
          - Fingerprint Sensor
          - Fingerprint Sensor (under display, optical)

          Hardware and OS

          OS
          Android 10.0 Android 10.0 Android 10, upgradable to Android 11, One UI 3.1
          User Interface
          One UI 2.0 One UI 2.0 One UI 2.1
          Processor
          Octa-core (2x2.2 GHz Cortex-A77 & 6x1.8 GHz Cortex A55), Exynos 980 (8 nm) Octa-core 2.0 GHz, Exynos 850 Octa-core (2x2.2 GHz Kryo 570 & 6x1.8 GHz Kryo 570), Qualcomm SM7225 Snapdragon 750 5G (8 nm)
          GPU
          Mali-G76 MP5 - Adreno 619
          RAM
          8 GB 3 GB 8 GB
          Internal Memory
          128 GB 64 GB 128 GB
          External Memory
          microSDXC (dedicated slot) microSDXC microSDXC

          Display

          Type
          Super AMOLED Capacitive Touchscreen
          Corning Gorilla Glass 3
          PLS TFT Capacitive Touchscreen HD+ Super AMOLED capacitive touchscreen
          Colors
          16M colors 16M colors 16M Colour
          Size
          6.5 inches 6.55 inches 6.6 inches
          Resolution
          1080 x 2400 pixels (405 ppi) 720 x 1600 pixels (268 ppi) 720 x 1600 pixels (266 ppi)
          Screen-to-Body Ratio
          87.17% - 84.18%
          Multi-Touch

          Multimedia

          3.5mm Jack
          Radio
          FM radio - Unspecified
          Games
          Yes + Downloadable Yes + Downloadable Yes + Downloadable
          Loud Speaker

          Camera

          Rear Camera
          48 MP + 12 MP + 5 MP + 5 MP 48 MP + 8 MP + 2 MP 48 MP + 8 MP + 5 MP + 5 MP
          Flash
          LED flash LED Flash LED Flash
          Features
          48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF
          12 MP, f/2.2, 12mm (ultrawide)
          5 MP, f/2.4, 25mm (macro), 1/5.0", 1.12µm
          5 MP, f/2.2, (depth)
          HDR, panorama
          48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF
          8 MP, f/2.4, (ultrawide), 1/4.0", 1.12µm
          2 MP, f/2.4, (macro)
          Panorama, HDR
          48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF
          8 MP, f/2.2, 12mm (ultrawide), 1/4.0", 1.12µm
          5 MP, f/2.4, (depth)
          5 MP, f/2.4, (macro)
          Panorama, HDR
          Video
          2160p@30fps, 1080p@30/120fps; gyro-EIS 1080p@30fps 4K@30fps, 1080p@30fps, 720p@480fps
          Front Camera
          32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm
          HDR
          1080p@30fps
          13 MP, f/2.3, 29mm (normal), 1/3.1", 1.12µm
          HDR, Panorama
          1080p@30fps
          20 MP, f/2.2, 0.8µm
          HDR
          1080p@30fps

          Connectivity and Data Rate

          GPRS
          Yes Yes Yes
          Edge
          Yes Yes Yes
          3G
          HSPA, LTE-A, 5G HSPA 42.2/5.76 Mbps, LTE-A HSPA 42.2/5.76 Mbps, LTE-A, 5G
          Bluetooth
          5.0, A2DP, LE 5.0, A2DP, LE 5.0, A2DP, LE
          Wi-Fi
          Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
          USB
          2.0, Type-C 1.0 reversible connector, USB On-The-Go Yes 2.0, Type-C 1.0 reversible connector
          GPS
          Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS Yes, with A-GPS, GLONASS, GALILEO, BDS
          Browser
          Yes Yes Yes

          User Memory

          Internal
          128 GB, 8 GB RAM or 128 GB, 6 GB RAM (UFS 2.0) 64 GB, 3 GB RAM or 32 GB, 3 GB RAM 128 GB, 8 GB RAM or 128 GB, 6 GB RAM or 128 GB, 4 GB RAM UFS 2.1
          Expandable Storage
          microSDXC (dedicated slot) microSDXC microSDXC
          USB OTG
          Supported Supported Supported

          Sensors

          Fingerprint
          fingerprint supported fingerprint supported fingerprint supported
          Proximity Sensor
          proximity sensor present proximity sensor present proximity sensor present
          Accelerometer Sensor
          accelerometer sensor present accelerometer sensor present accelerometer sensor present
          Magnetic-field Sensor (Compass)
          magnetic field sensor present magnetic field sensor not present magnetic field sensor present
          Gyroscope Sensor
          gyroscope sensor present gyroscope sensor not present gyroscope sensor present
          NFC
          NFC not supported NFC supported NFC supported

          Battery

          Type
          Non-removable Li-Po Battery
          Fast battery charging 15W
          Non-removable Li-Po Battery
          Battery Charging 10W
          Non-removable Li-Po Battery
          Fast battery charging 15W
          Capacity
          4500 mAh 5000 mAh 5000 mAh
          Stand by
          - - -
          Talk Time
          - - -

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