Samsung Galaxy A31 vs Samsung Galaxy S21 Ultra 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.

9.1
Samsung Galaxy S21 Ultra
Samsung Galaxy A31 Samsung Galaxy S21 Ultra
Released · Apr 27, 2020
Released · Jan 29, 2021
6.4-inch · 2400x1080px
6.8-inch · 3200x1440px
Quad camera
Quad camera
4GB · 64GB
12GB · 128GB
5000 mAh
5000 mAh
Check prices

Availability

Officially announced
Mar 24, 2020 Jan 14, 2021
MSRP
€ 300 $ 1200 / € 1399

Design

Dimensions
6.27 x 2.88 x 0.34 inches
159.3 x 73.1 x 8.6 mm
6.50 x 2.98 x 0.35 inches (~0.37 inches with camera bump)
165.1 x 75.6 x 8.9 mm (~9.4 mm with camera bump)
Weight
6.53 oz (185.0 g) 8.04 oz (229.0 g)
Materials
Back: Plastic Back: Glass (Corning Gorilla Glass Victus)
Frame: Aluminum
Resistance
Water, Dust; IP68
Biometrics
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 blue, Prism Crush red, Prism Crush white Phantom black, Silver

Display

Size
6.4-inch, 84.88% screen-to-body 6.8-inch, 89.33% screen-to-body
Type
Super AMOLED, 60Hz Dynamic AMOLED, 120Hz, HDR, 1500 nits
Resolution
2400x1080px, 20:9 ratio, 411 PPI 3200x1440px, 20:9 ratio, 516 PPI
Protection
Corning Gorilla Glass Victus

Hardware

System chip
MediaTek Helio P65 MT6768 (12 nm) Snapdragon 888 SM8350 (5 nm)
Processor
Octa-core
2x2.0GHz Cortex-A75
6x2.0G​Hz Cortex-A55
Octa-core
1x2.84GHz Kryo 680
3x2.42GHz Kryo 680
4x1.80GHz Kryo 680
GPU
Mali-G52 MC2 Adreno 660
Memory
4GB (LPDDR4)/64GB (eMMC 5.1)
6GB/128GB
12GB (LPDDR5)/128GB (UFS 3.1)
12GB/256GB
16GB/512GB
Storage expansion
microSDXC up to 512 GB not expandable
OS
Android (10) Android (14, 13, 12, 11)

Battery

Type
5000 mAh, Li - Polymer 5000 mAh, 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: 15.0W Wired: 25.0W
Wireless: 15.0W
PhoneArena Battery Tests
Battery Life Estimate
Untested
Browsing
Untested
Video
Untested
Gaming
Untested
Battery Life Estimate
6h 15min
Browsing
14h 43min
Video
8h 52min
Gaming
8h 40min

Camera

Rear
Quad camera Quad camera
Main camera
48 MP (PDAF)
Aperture size: F2.0
Focal length: 26 mm
Sensor size: 1/2"
Pixel size: 0.8 μm
108 MP (OIS, Laser and PDAF)
Aperture size: F1.8
Focal length: 24 mm
Sensor size: 1/1.33"
Pixel size: 0.8 μm
Second camera
8 MP (Ultra-wide)
Aperture size: F2.2
Sensor size: 1/4"
Pixel size: 1.12 μm
12 MP (Ultra-wide, PDAF)
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
10 MP (Telephoto, OIS, PDAF)
Optical zoom: 3.0x
Aperture size: F2.4
Focal Length: 70 mm
Sensor size: 1/3.2"
Pixel size: 1.22 μm
Fourth camera
5 MP (Depth information)
Aperture size: F2.4
10 MP (Telephoto, Periscope, OIS, PDAF)
Optical zoom: 3.0x
Aperture size: F2.4
Focal Length: 70 mm
Sensor size: 1/3.2"
Pixel size: 1.22 μm
Flash
LED LED
Video recording
1080p (30 fps) 8K UHD (24 fps), 4K UHD (60 fps), 1080p (240 fps), 720p (960 fps)
OIS, HDR, Hyperlapse, Video light, EIS
Front
20 MP
Video capture: 1080p
40 MP (PDAF, HDR)
Video capture: 4K UHD (60 fps)

Connectivity & Features

Bluetooth
5.0 5.1
WLAN
a,b,g,n,ac,dual-band
Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac
a,b,g,n,ac,Wi-Fi 6,dual-band
MIMO, Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, ax
USB
Type-C, USB 2.0 Type-C, USB 3.2
Sensors
Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer, 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, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Other
NFC NFC, ANT+

Multimedia

Headphones
3.5mm jack No 3.5mm jack
Speakers
Earpiece, Loudspeaker Earpiece, Multiple speakers
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, 20 Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 18, 19, 20, 25, 26, 28, 30(2300 WCS), 66(AWS-3), 71(600)
4G (TDD)
Bands 38, 40, 41 Bands 38, 39, 40, 41, 46, 48
3G
Bands 1, 2, 5, 8 Bands 1, 2, 4, 5, 8
Data Speed
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s LTE-A Pro Cat 20 (2000/150 Mbit/s)
Dual SIM
Yes
SIM type
Nano SIM Nano SIM

Regulatory Approval

FCC approval
Date approved: Mar 08, 2020
FCC ID value: A3LSMA315GL
Date approved: Dec 22, 2020
FCC ID value: A3LSMG998U
Measured SAR
Head: 0.53 W/kg
Body: 0.56 W/kg
Simultaneous Transmission: 1.42 W/kg
Wireless Router: 0.65 W/kg
Phablet: 0.89 W/kg
Head: 0.77 W/kg
Body: 1.02 W/kg
Simultaneous Transmission: 1.59 W/kg
Wireless Router: 1.16 W/kg
Phablet: 3.15 W/kg

Alternative variants

with 128GB storage
Memory 6GB/128GB
with 256GB storage
Memory 256GB
Colors Phantom black
MSRP $ 1250
with 512GB storage
Memory 16GB/512GB
Colors Phantom black
MSRP $ 1380
for Europe
System chip Samsung Exynos 2100 (5 nm)
Processor Octa-core
1x2.91GHz Cortex-X1
3x2.81G​Hz Cortex-A78
4x2.2G​Hz Cortex-A55
GPU Mali G78 MP14
Weight 8.01 oz (227.0 g)
5G Bands SA, NSA, Sub-6
FCC approval Date approved: Dec 22, 2020
FCC ID value: A3LSMG998B
Measured SAR Head: 0.16 W/kg
Body: 0.72 W/kg
Simultaneous Transmission: 1.59 W/kg
Wireless Router: 1.34 W/kg
Phablet: 3.86 W/kg
FCC OKs Cingular\'s purchase of AT&T Wireless