Samsung Galaxy S21 vs Google Pixel 4a Specs Comparison

Design

Dimensions
5.97 x 2.80 x 0.31 inches 151.7 x 71.2 x 7.9 mm	5.67 x 2.73 x 0.32 inches 144 x 69.4 x 8.2 mm
Weight
6.03 oz (171.0 g)	5.04 oz (143.0 g)
Materials
Back: Plastic Frame: Aluminum	Back: Plastic Frame: Plastic
Resistance
Water, Dust; IP68
Biometrics
2D Face unlock, Ultrasonic in-screen fingerprint	Fingerprint (touch)
Keys
Right: Volume control, Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Phantom pink, Violet, Gray, White	Just black

Display

Size
6.2-inch	5.8-inch
Resolution
2400x1080px, 20:9 ratio, 424 PPI	2340x1080px, 19.5:9 ratio, 444 PPI
Technology
Dynamic AMOLED	OLED
Refresh rate
120Hz (adaptive)	60Hz
Screen-to-body
86.06 %	82.53 %
Peak brightness
1300 cd/m2 (nit)
Features
HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor	HDR support, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 888 (5 nm)	Qualcomm Snapdragon 730G SM7150-AA (8 nm)
Processor
Octa-core 1x 2.84GHz Kryo 680 + 3x 2.42GHz Kryo 680 + 4x 1.80GHz Kryo 680	Octa-core 2200 MHz Kryo 470
GPU
Adreno 660	Adreno 618
RAM
8GB (LPDDR5)	6GB (LPDDR4)
Internal storage
128GB (UFS 3.0)	128GB (UFS 2.1)
Storage expansion
not expandable	not expandable
OS
Android (13, 12, 11), Samsung One UI	Android (12, 11, 10)

Battery

Capacity
4000 mAh	3140 mAh
Type
Li - Polymer	Li - Polymer
Charging
Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging, Reverse wireless charging	USB Power Delivery
Charge speed
Wired: 25.0W Wireless: 15.0W	Wired: 18.0W

PhoneArena Battery Tests

Battery Life Estimate

4h 28min

Browsing

7h 47min

Video

7h 36min

Gaming

7h 9min

Battery Life Estimate

4h 15min

Browsing

9h 27min

Video

6h 48min

Gaming

4h 51min

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Triple camera	Single camera
Main camera
12 MP (OIS, PDAF) Aperture size: F1.8 Focal length: 26 mm Sensor size: 1/1.76" Pixel size: 1.8 μm	12.2 MP (OIS, PDAF) Aperture size: F1.7 Focal length: 27 mm Sensor size: 1/2.55" Pixel size: 1.4 μm
Second camera
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
64 MP (Telephoto, OIS, PDAF) Aperture size: F2.0 Focal Length: 29 mm Sensor size: 1/1.7" Pixel size: 0.8 μm
Flash
LED	LED
Video recording
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	3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps) EIS
Front
10 MP (PDAF, HDR), Video capture: 3840x2160 (4K UHD) (60 fps)	8 MP, Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
5.0	5.1
WLAN
802.11 a,b,g,n,ac,ax(Wi-Fi 6),dual-band MIMO, Wi-Fi Direct, Hotspot	802.11 a,b,g,n,ac,dual-band MIMO, Wi-Fi Direct, Hotspot
USB
Type-C, USB 3.2	Type-C, USB 3.1
Hearing aid compatible
M3/T3	M3/T4
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer	Accelerometer, Gyroscope, Compass, Barometer
Other
NFC, ANT+	NFC

Multimedia

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

Cellular

5G
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), 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)	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), 17(700 b), 18(800 Lower), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)
4G (TDD)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)	Bands 38(2600), 39(1900+), 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, UMTS	LTE-A Cat 11 (600/75 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM
	Yes
SIM type
Nano SIM	Nano SIM, eSIM

Regulatory Approval

FCC approval
Date approved: Dec 08, 2020 FCC ID value: A3LSMG991U	Date approved: Jun 25, 2020 FCC ID value: A4RG025J
Measured SAR
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	Head: 1.18 W/kg Body: 1.19 W/kg Simultaneous Transmission: 1.59 W/kg Wireless Router: 1.00 W/kg

Buyers information

MSRP
$ 800	$ 349
In The Box
C to C Data Cable, Ejection Pin	18W USB-C power adapter, 1 m USB-C to USB-C cable (USB 2.0), Quick Start Guide, Quick Switch Adapter, SIM tool

Availability

Officially announced
Jan 14, 2021	Aug 03, 2020

Alternative variants

with 256GB storage

Internal storage	256GB

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

Links

Full specifications
Samsung Galaxy S21 Specs	Google Pixel 4a Specs
PhoneArena Review
Samsung Galaxy S21 Review	Google Pixel 4a Review
User Reviews
Samsung Galaxy S21 User Reviews	Google Pixel 4a User Reviews