Phone Comparison - Samsung Galaxy A51 5G vs Samsung Galaxy A72 vs Samsung Galaxy M21s

general General Info

Manufacturer Samsung Samsung Samsung
Announced April 2020 2021, March 17 November 2020
Status Coming Soon - April 2020 Coming soon. Exp. release 2021, March 26 Available - November 2020
Colors Prism Cube Black, Prism Cube White, Prism Cube Pink Awesome Black, Awesome White, Awesome Violet, Awesome Blue Blue, Black
Form Factor Candybar Candybar Candybar
Dimension 158.9 x 73.6 x 8.7 mm
(6.26 x 2.9 x 0.34 in)
165 x 77.4 x 8.4 mm
(6.5 x 3.05 x 0.33 in)
159.2 x 75.1 x 8.9 mm
(6.27 x 2.96 x 0.35 in)
Weight 187 g (6.6 oz) 203 g (7.16 oz) 191 g (6.74 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 / 1700(AWS) / 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 LTE
5G Network 5G SA/NSA - -
Messaging
Build Features - Fingerprint Sensor (under display, optical)
- Fingerprint Sensor (under display, optical)
- Fingerprint Sensor

hardware Hardware and OS

OS Android 10.0 Android 11 Android 10
User Interface One UI 2.0 One UI 3.0 One UI 2.5
Processor Octa-core (2x2.2 GHz Cortex-A77 & 6x1.8 GHz Cortex A55), Exynos 980 (8 nm) Octa-core (2x2.3 GHz Kryo 465 Gold & 6x1.8 GHz Kryo 465 Silver), Qualcomm SM7125 Snapdragon 720G (8 nm) Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53), Exynos 9611 (10nm)
GPU Mali-G76 MP5 Adreno 618 Mali-G72 MP3
RAM 8 GB 8 GB 4 GB
Internal Memory 128 GB 128 GB 128 GB
External Memory microSDXC (dedicated slot) microSDXC (dedicated slot) microSDXC

display Display

Type Super AMOLED Capacitive Touchscreen
Corning Gorilla Glass 3
FHD+ Super AMOLED Screen
90Hz Refresh Rate
800 nits (peak)
Corning Gorilla Glass 5
Super AMOLED Screen, 420 nits (typ), Corning Gorilla Glass 3
Colors 16M colors 16M Colour 16M Colour
Size 6.5 inches 6.7 inches 6.4 inches
Resolution 1080 x 2400 pixels (405 ppi) 1080 x 2400 pixels (393 ppi) 1080 x 2340 pixels (403 ppi)
Screen-to-Body Ratio 87.17% 84.78% 83.97%
Multi-Touch yes yes yes

multimedia Multimedia

3.5mm Jack yes yes yes
Radio FM radio Unspecified FM radio, RDS, recording
Games Yes + Downloadable Yes + Downloadable Yes + Downloadable
Loud Speaker yes yes yes

camera Camera

Rear Camera 48 MP + 12 MP + 5 MP + 5 MP 64 MP + 8 MP + 12 MP + 2 MP 64 MP + 8 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
64 MP, f/1.8, 26mm (wide), PDAF, OIS
8 MP, f/2.4, (telephoto), PDAF, OIS, 3x optical zoom
12 MP, f/2.2, 123˚ (ultrawide)
5 MP, f/2.4, (macro)
panorama, HDR
64 MP, (wide), PDAF
8 MP, f/2.2, 12mm (ultrawide), 1/4.0", 1.12µm
5 MP, f/2.2, (depth)
Panorama, HDR
Video 2160p@30fps, 1080p@30/120fps; gyro-EIS 4K@30fps, 1080p@30/120fps; gyro-EIS 4K@30fps, 1080p@30fps, gyro-EIS
Front Camera 32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm
HDR
1080p@30fps [Similar]
32 MP, f/2.0, 26mm (wide), 1/2.8", 0.8µm
HDR
1080p@30fps [Similar]
32 MP, f/2.4, (wide), 1/2.8", 0.8µm
HDR
1080p@30fps [Similar]

connectivity 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
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 a/b/g/n/ac, dual-band, 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 2.0, Type-C 1.0 reversible connector, USB On-The-Go USB Type-C 2.0
GPS Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS, GLONASS, GALILEO, BDS Yes, with A-GPS, GLONASS, BDS
Browser Yes Yes Yes

memory User Memory

Internal 128 GB, 8 GB RAM or 128 GB, 6 GB RAM (UFS 2.0) 128 GB, 8 GB RAM or 128 GB, 6 GB RAM (UFS 2.1) 128 GB, 4 GB RAM or 64 GB, 4 GB RAM
Expandable Storage microSDXC (dedicated slot) microSDXC (dedicated slot) microSDXC
USB OTG Supported Supported Not Supported

Apps 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 present magnetic field sensor present
Gyroscope Sensor gyroscope sensor present gyroscope sensor present gyroscope sensor present
NFC NFC not supported NFC supported NFC not supported

battery Battery

Type Non-removable Li-Po Battery
Fast battery charging 15W
Non-removable Li-Po Battery
Fast battery charging 25W
Non-removable Li-Po Battery
Fast battery charging 15W
Capacity 4500 mAh 5000 mAh 6000 mAh
Stand by - - -
Talk Time - - -