Samsung Galaxy S21 vs Samsung Galaxy A02s Specs Comparison

Availability

Officially announced
Jan 14, 2021	Nov 24, 2020
Prices (MSRP)
$800

Design

Dimensions
5.97 x 2.80 x 0.31 inches 151.7 x 71.2 x 7.9 mm	6.46 x 2.99 x 0.36 inches 164.2 x 75.9 x 9.1 mm
Weight
6.03 oz (171.0 g)	6.91 oz (196.0 g)
Materials
Back: Plastic Frame: Aluminum	Back: Plastic Frame: Plastic
Resistance
Water, Dust; IP68
Biometrics
2D Face unlock, Ultrasonic in-screen fingerprint
Keys
Right: Volume control, Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Phantom pink, Violet, Gray, White	Black, White, Blue

Display

Size
6.2-inch, 86.06% screen-to-body	6.5-inch, 81.80% screen-to-body
Type
Dynamic AMOLED, 120Hz, HDR, 1300 nits	IPS LCD, 60Hz
Resolution
2400x1080px, 20:9 ratio, 424 PPI	1600x720px, 20:9 ratio, 270 PPI
Protection
Corning Gorilla Glass Victus

Hardware

System chip
Snapdragon 888 (5 nm)	Snapdragon 450 SDM450 (14 nm)
Processor
Octa-core 1x2.84GHz Kryo 680 3x2.42GHz Kryo 680 4x1.80GHz Kryo 680	Octa-core 8x1.8GHz Cortex-A53
GPU
Adreno 660	Adreno 506
Memory
8GB (LPDDR5)/128GB (UFS 3.0) 8GB/256GB	3GB/32GB (eMMC 5.1) 4GB/64GB
Storage expansion
not expandable	microSDXC up to 1024 GB
OS
Android (13, 12, 11)	Android (12, 11, 10)

Battery

Type
4000 mAh, Li - Polymer	5000 mAh, Li - Polymer
Charging
Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging Qi and Powermat wireless charging, Reverse wireless charging	Samsung Adaptive Fast Charging
Charge speed
Wired: 25.0W Wireless: 15.0W	Wired: 15.0W

PhoneArena Battery Tests

Battery Life Estimate

4h 28min

Browsing

7h 47min

Video

7h 36min

Gaming

7h 9min

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Triple camera	Triple 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	13 MP (Autofocus) Aperture size: F2.2
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	2 MP (Macro) Aperture size: F2.4
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	2 MP (Depth information) Aperture size: F2.4
Flash
LED	LED
Video recording
8K UHD (24 fps), 4K UHD (60 fps), 1080p (240 fps), 720p (960 fps) OIS, HDR, Hyperlapse, Continuous autofocus, Video light, EIS	1080p (30 fps)
Front
10 MP (PDAF, HDR) Video capture: 4K UHD (60 fps)	5 MP

Connectivity & Features

Bluetooth
5.0	4.2
WLAN
a,b,g,n,ac,Wi-Fi 6,dual-band MIMO, Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac, ax	b,g,n,802.1x Wi-Fi Direct, Hotspot 802.11 b, g, n
USB
Type-C, USB 3.2	Type-C, USB 2.0
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer, Ambient light sensor, Proximity sensor	Accelerometer, Ambient light sensor, Proximity sensor
Hearing aid compatible
M3/T3
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Cell ID, Wi-Fi positioning
Other
NFC, ANT+

Multimedia

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

Cellular

5G Bands
n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave
4G (FDD) Bands
1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30, 66, 71	1, 3, 5, 7, 8, 20, 28
4G (TDD) Bands
38, 39, 40, 41, 46, 48	38, 40, 41
3G Bands
1, 2, 4, 5, 8	1, 5, 8
Data Speed
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS	LTE Cat 4 (150/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM
	Yes
SIM type
Nano SIM	Nano SIM

Regulatory Approval

FCC approval
Date approved: Dec 08, 2020 FCC ID value: A3LSMG991U	Date approved: Feb 07, 2021 FCC ID value: ZCASMA025U
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: 1.00 W/kg Body: 0.85 W/kg Simultaneous Transmission: 1.40 W/kg Wireless Router: 0.85 W/kg

Alternative variants

with 256GB storage

Memory	256GB

with 64GB storage

Memory	4GB/64GB

for Europe

System chip	Samsung Exynos 2100 (5 nm)
Processor	Octa-core 2900 MHz 1x2.91GHz Cortex-X1 3x2.81G​Hz Cortex-A78 4x2.2G​Hz 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	Samsung Galaxy A02s Specs
PhoneArena Review
Samsung Galaxy S21 Review
User Reviews
Samsung Galaxy S21 User Reviews	Samsung Galaxy A02s User Reviews