Samsung Galaxy A51 5G vs Samsung Galaxy S21 Specs Comparison

Design

Dimensions
6.26 x 2.90 x 0.34 inches 158.9 x 73.6 x 8.7 mm	5.97 x 2.80 x 0.31 inches 151.7 x 71.2 x 7.9 mm
Weight
6.60 oz (187.0 g)	6.03 oz (171.0 g)
Materials
Back: Plastic Frame: Aluminum	Back: Plastic Frame: Aluminum
Resistance
	Water, Dust; IP68
Biometrics
2D Face unlock, Optical in-screen fingerprint	2D Face unlock, Ultrasonic in-screen fingerprint
Keys
Right: Volume control, Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Prism cube black	Phantom pink, Violet, Gray, White

Display

Size
6.5-inch	6.2-inch
Resolution
2400x1080px, 20:9 ratio, 405 PPI	2400x1080px, 20:9 ratio, 424 PPI
Technology
Super AMOLED	Dynamic AMOLED
Refresh rate
60Hz	120Hz (adaptive)
Screen-to-body
87.37 %	86.06 %
Peak brightness
	1300 cd/m2 (nit)
Features
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor	HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor

Hardware

System chip
Samsung Exynos 980 (8 nm)	Qualcomm Snapdragon 888 (5 nm)
Processor
Octa-core 2x 2.2GHz Cortex-A77 + 6x 1.8GHz Cortex-A55	Octa-core 1x 2.84GHz Kryo 680 + 3x 2.42GHz Kryo 680 + 4x 1.80GHz Kryo 680
GPU
Mali-G76 MP5	Adreno 660
RAM
6GB (LPDDR4)	8GB (LPDDR5)
Internal storage
128GB, available to use: 105.3 GB	128GB (UFS 3.0)
Storage expansion
microSDXC up to 1000 GB	not expandable
OS
Android (11, 10), Samsung One UI	Android (13, 12, 11), Samsung One UI

Battery

Capacity
4500 mAh	4000 mAh
Type
Li - Polymer	Li - Polymer
Charging
Fast charging	Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging, Reverse wireless charging
Charge speed
Wired: 25.0W	Wired: 25.0W Wireless: 15.0W

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

4h 28min

Browsing

7h 47min

Video

7h 36min

Gaming

7h 9min

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Quad camera	Triple camera
Main camera
48 MP (PDAF) Aperture size: F2.0 Focal length: 26 mm Sensor size: 1/2" Pixel size: 0.8 μm	12 MP (OIS, PDAF) Aperture size: F1.8 Focal length: 26 mm Sensor size: 1/1.76" Pixel size: 1.8 μm
Second camera
12 MP (Ultra-wide) Aperture size: F2.2 Focal Length: 13 mm Pixel size: 1.12 μm	12 MP (Ultra-wide, Autofocus) Aperture size: F2.2 Focal Length: 13 mm Sensor size: 1/2.55" Pixel size: 1.4 μm
Third camera
5 MP (Macro) Aperture size: F2.4 Focal Length: 40 mm	64 MP (Telephoto, OIS, PDAF) Aperture size: F2.0 Focal Length: 29 mm Sensor size: 1/1.7" Pixel size: 0.8 μm
Fourth camera
5 MP (Depth information) Aperture size: F2.2 Sensor size: 1/5" Pixel size: 1.12 μm
Flash
LED	LED
Video recording
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (480 fps) Hyperlapse, EIS	7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps) OIS, HDR, Hyperlapse, Continuous autofocus, Video light, EIS
Front
32 MP (HDR), Video capture: 1920x1080 (Full HD)	10 MP (PDAF, HDR), Video capture: 3840x2160 (4K UHD) (60 fps)

Connectivity & Features

Bluetooth
5.0	5.0
WLAN
802.11 a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot	802.11 a,b,g,n,ac,ax(Wi-Fi 6),dual-band MIMO, Wi-Fi Direct, Hotspot
USB
Type-C, USB 2.0	Type-C, USB 3.2
Hearing aid compatible
M3/T3	M3/T3
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers)	Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer
Other
NFC, ANT+	NFC, ANT+

Multimedia

Headphones
3.5mm jack	No 3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Multiple speakers
Features
Dolby Atmos	32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus
Screen mirroring
Wireless screen share	Wireless screen share
Radio
FM	FM, Stereo, RDS
Additional microphone(s)
Noise cancellation	Noise cancellation, Video recording

Cellular

5G
Bands n41, n71, SA, NSA	Bands n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave
4G (FDD)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 17(700 b), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 66(AWS-3), 71(600)	Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 30(2300 WCS), 66(AWS-3), 71(600)
4G (TDD)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)	Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)
3G
Bands 1(2100), 2(1900), 4(1700/2100), 5(850)	Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed
LTE-A Pro Cat 16 (1000/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s	LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
SIM type
	Nano SIM
HD Voice
Yes

Regulatory Approval

FCC approval
Date approved: Jul 15, 2020 FCC ID value: A3LSMA516U	Date approved: Dec 08, 2020 FCC ID value: A3LSMG991U
Measured SAR
Head: 1.18 W/kg Body: 1.20 W/kg Simultaneous Transmission: 3.25 W/kg Wireless Router: 1.37 W/kg	Head: 0.36 W/kg Body: 1.08 W/kg Simultaneous Transmission: 3.96 W/kg Wireless Router: 1.09 W/kg Phablet: 2.49 W/kg

Buyers information

MSRP
$ 500	$ 800
In The Box
A to C USB Cable, Wall Adapter, SIM Pin/Ejector, Quick Start Guide, Terms & Conditions	C to C Data Cable, Ejection Pin

Availability

Officially announced
Apr 08, 2020	Jan 14, 2021

Alternative variants

with 8GB RAM

RAM	8GB

with 256GB storage

Internal storage	256GB

for Europe

Colors	Prism cube black, Prism cube white
5G	Bands n41, n78, SA, NSA
4G (FDD)	Bands 1(2100), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 20(800 DD), 28(700 APT)
4G (TDD)	Bands 38(2600), 40(2300), 41(2600+)
3G	Bands 5(850), 8(900), 2(1900), 1(2100)
Dual SIM	Yes
SIM type	Nano SIM

for Europe

System chip	Samsung Exynos 2100 (5 nm)
Processor	Octa-core 2900 MHz 1x 2.91GHz Cortex-X1 + 3x 2.81GHz Cortex-A78 + 4x 2.2GHz Cortex-A55
GPU	Mali G78 MP14
Weight	5.96 oz (169.0 g)
5G	Bands SA, NSA, Sub-6
FCC approval	Date approved: Dec 18, 2020 FCC ID value: A3LSMG991B
Measured SAR	Head: 0.42 W/kg Body: 0.94 W/kg Simultaneous Transmission: 3.96 W/kg Wireless Router: 1.34 W/kg Phablet: 2.37 W/kg

for Verizon

System chip	Qualcomm Snapdragon 765G SM7250-AB (7 nm)
Processor	Octa-core 2400 MHz Kryo 475
GPU	Adreno 620
Colors	Prism bricks blue
5G	Bands n260, n261, mmWave
4G (FDD)	Bands 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 12(700 a), 13(700 c), 20(800 DD), 28(700 APT), 66(AWS-3)
3G	Bands 5(850), 8(900), 2(1900), 1(2100)
FCC approval	Date approved: Jul 20, 2020 FCC ID value: A3LSMA516V
Measured SAR	Head: 0.32 W/kg Body: 1.32 W/kg Simultaneous Transmission: 3.01 W/kg Wireless Router: 1.37 W/kg Phablet: 3.91 W/kg
MSRP	$ 550

Links

Full specifications
Samsung Galaxy A51 5G Specs	Samsung Galaxy S21 Specs
PhoneArena Review
	Samsung Galaxy S21 Review
User Reviews
Samsung Galaxy A51 5G User Reviews	Samsung Galaxy S21 User Reviews