Samsung Galaxy A51 vs Samsung Galaxy S21 FE Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.

7.0	8.3
Samsung Galaxy A51	Samsung Galaxy S21 FE
Released · Dec 27, 2019	Released · Jan 11, 2022
6.5-inch · 2400x1080px	6.4-inch · 2340x1080px
Quad camera	Triple camera
4GB · 128GB	6GB · 128GB
4000 mAh	4500 mAh
Check prices	Check prices

Design

Dimensions
6.24 x 2.90 x 0.31 inches 158.5 x 73.6 x 7.9 mm	6.13 x 2.93 x 0.31 inches (~0.36 inches with camera bump) 155.7 x 74.5 x 7.9 mm (~9.2 mm with camera bump)
Weight
6.07 oz (172.0 g)	6.00 oz (170.0 g)
Materials
Back: Plastic Frame: Plastic	Back: Plastic Frame: Metal
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 Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue	White, Graphite, Lavender, Olive

Display

Size
6.5-inch	6.4-inch
Resolution
2400x1080px, 20:9 ratio, 405 PPI	2340x1080px, 19.5:9 ratio, 403 PPI
Technology
Super AMOLED	Dynamic AMOLED
Refresh rate
60Hz	120Hz
Screen-to-body
87.37 %	86.77 %
Peak brightness
	1200 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 9611 (10 nm)	Qualcomm Snapdragon 888 SM8350 (5 nm)
Processor
Octa-core 2300 MHz 4x 2.3GHz Cortex-A73 + 4x 1.7GHz Cortex-A53	Octa-core 1x 2.84GHz Cortex-X1 + 3x 2.42GHz Cortex-A78 + 4x 1.80GHz Cortex-A55
GPU
Mali-G72 MP3	Adreno 660
RAM
4GB (LPDDR4)	6GB (LPDDR5)
Internal storage
128GB, available to use: 105.9 GB	128GB (UFS 3.1)
Storage expansion
microSDXC up to 512 GB	not expandable
OS
Android (11, 10), Samsung One UI	Android (14, 13, 12), One UI

Battery

Capacity
4000 mAh	4500 mAh
Type
Li - Polymer	Li - Ion
Charging
Fast charging	Fast charging, Qi wireless charging, Reverse wireless charging
Charge speed
	Wired: 25.0W Wireless: 15.0W

Battery Life Estimate

5h 22min

Browsing

11h 35min

Video

8h 35min

Gaming

6h 40min

Battery Life Estimate

Untested

Browsing

9h 39min

Video

7h 19min

Gaming

Untested

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) Aperture size: F2.2 Focal Length: 13 mm Sensor size: 1/3"
Third camera
5 MP (Macro) Aperture size: F2.4 Focal Length: 40 mm	8 MP (Telephoto, OIS) Optical zoom: 3.0x Aperture size: F2.4 Focal Length: 13 mm Sensor size: 1/4.5" Pixel size: 1.0 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) (240 fps) Hyperlapse, EIS	3840x2160 (4K UHD) (60 fps) HDR, Continuous autofocus, Picture-taking during video recording, 10-bit HDR
Front
32 MP (HDR), Video capture: 1920x1080 (Full HD)	32 MP (HDR, Autofocus), 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) Wi-Fi Direct, Hotspot
USB
Type-C, USB 2.0	Type-C, USB 3.2
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers)	Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Other
NFC, ANT+	NFC

Multimedia

Headphones
3.5mm jack	No 3.5mm jack
Speakers
Earpiece, Loudspeaker	Earpiece, Loudspeaker
Features
Dolby Atmos
Screen mirroring
Wireless screen share	Wireless screen share
Radio
FM	FM, Stereo, RDS
Additional microphone(s)
Noise cancellation	Noise cancellation

Cellular

5G
	Bands n1, n3, n5, n8, n20, n28, n38, n40, n41, n66, n78, 5G Ready
4G (FDD)
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), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)	Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 17(700 b), 20(800 DD), 26(850+), 28(700 APT), 32(1500 L-band), 66(AWS-3)
4G (TDD)
Bands 38(2600), 39(1900+), 41(2600+)	Bands 38(2600), 40(2300), 41(2600+)
3G
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)	Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s	LTE-A Pro Cat 20 (2000/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s
SIM type
Nano SIM	Dual Nano SIM

Regulatory Approval

FCC approval
Date approved: Nov 28, 2019 FCC ID value: A3LSMA515FN	Date approved: Jun 29, 2021 FCC ID value: A3LSMG990U
Measured SAR
Head: 0.89 W/kg Body: 1.18 W/kg Simultaneous Transmission: 1.56 W/kg Wireless Router: 1.12 W/kg Phablet: 2.76 W/kg	Head: 0.77 W/kg Body: 0.90 W/kg Simultaneous Transmission: 1.48 W/kg Wireless Router: 1.09 W/kg

Buyers information

MSRP
$ 400	$ 700 / € 749
In The Box
	Phone, Type-C cable, documentation

Availability

Officially announced
Dec 12, 2019	Jan 04, 2022

Alternative variants

with 128GB storage


RAM	6GB
Internal storage	128GB

With 8GB RAM and 256GB internal storage


RAM	8GB
Internal storage	256GB
MSRP	$ 770

for Verizon


4G (FDD)	Bands 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 13(700 c), 20(800 DD), 28(700 APT), 66(AWS-3)
3G	Bands 5(850), 8(900), 2(1900), 1(2100)

for AT&T


4G (FDD)	Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 25(1900+), 26(850+), 66(AWS-3), 71(600)
4G (TDD)	Bands 41(2600+)

for Sprint


4G (FDD)	Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 25(1900+), 26(850+), 66(AWS-3), 71(600)
4G (TDD)	Bands 41(2600+)

for Europe


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), 26(850+), 28(700 APT), 66(AWS-3)
4G (TDD)	Bands 38(2600), 40(2300), 41(2600+)
Dual SIM	Yes

Links

Full specifications
Samsung Galaxy A51 Specs	Samsung Galaxy S21 FE Specs
PhoneArena Review
Samsung Galaxy A51 Review	Samsung Galaxy S21 FE Review
User Reviews
Samsung Galaxy A51 User Reviews	Samsung Galaxy S21 FE User Reviews