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Samsung Galaxy M31 vs Galaxy A21s

Here we compared two smartphones: the 6.4-inch Samsung Galaxy M31 (with Exynos 7 Octa 9611) that was released on February 25, 2020, against the Samsung Galaxy A21s, which is powered by Exynos 850 and came out 2 months after. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.

Key differences

An overview of the main advantages of each smartphone
Reasons to consider the Samsung Galaxy M31
  • 49% higher pixel density (403 vs 270 PPI)
  • Comes with 1000 mAh larger battery capacity: 6000 vs 5000 mAh
  • 47% better performance in AnTuTu Benchmark (187K versus 127K)
  • Slow-motion recording at 240FPS
  • Ability to record video in 4K resolution
  • Delivers 24% higher maximum brightness (620 against 499 nits)
  • Super AMOLED display (versus competitor's PLS TFT)
  • The front-facing camera can record video at 4K
Reasons to consider the Samsung Galaxy A21s
  • More energy-efficient CPU – Exynos 850

Review

Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation

Value for money

You can enter your local price of these phones (in USD or any other currency) and click on the "Calculate" button to see which one has a better value for money.
Price

Tests and specifications

Comparison table of technical specifications and tests

Display

Type Super AMOLED PLS TFT
Size 6.4 inches 6.5 inches
Resolution 1080 x 2340 pixels 720 x 1600 pixels
Aspect ratio 19.5:9 20:9
PPI 403 ppi 270 ppi
Refresh rate 60 Hz 60 Hz
HDR support Yes, HDR10 No
Screen protection Corning Gorilla Glass 3 Tempered glass
Screen-to-body ratio 84% 82.8%
Display features - Always-On Display -
Display tests
RGB color space 142% 88.4%
PWM 208 Hz 500 Hz
Response time 8.5 ms 30.4 ms
Contrast ∞ Infinity 1500:1
Max. Brightness
Galaxy M31 +24%
620 nits
499 nits
Sources: NotebookCheck [1], [2]

Design and build

Height 159.2 mm (6.27 inches) 163.6 mm (6.44 inches)
Width 75.1 mm (2.96 inches) 75.3 mm (2.96 inches)
Thickness 8.9 mm (0.35 inches) 8.9 mm (0.35 inches)
Weight 191 gramm (6.74 oz) 192 gramm (6.77 oz)
Waterproof No No
Rear material Plastic Plastic
Frame material Plastic Plastic
Colors Black, Blue, Red Black, Blue, Red
Fingerprint scanner Yes, rear Yes, rear
Screen-to-body ratio
84%
82.8%

Performance

Tests of Samsung Galaxy M31 and Samsung Galaxy A21s in the benchmarks
SoC
Chipset Samsung Exynos 7 Octa 9611 Samsung Exynos 850
Max. clock 2300 MHz 2000 MHz
CPU cores 8 (4 + 4) 8 (8)
Architecture - 4 cores at 1.7 GHz: Cortex-A53
- 4 cores at 2.3 GHz: Cortex-A73
- 8 cores at 2 GHz: Cortex-A55
Lithography process 10 nanometers 8 nanometers
Graphics Mali-G72 MP3 Mali-G52 MP1
GPU clock 850 MHz 820 MHz
FLOPS ~259 GFLOPS ~26 GFLOPS
Memory
RAM size 6 GB 3, 4 GB
Memory type LPDDR4X LPDDR4X
Memory clock 1866 MHz 1866 MHz
Channels 2 2
Storage
Storage size 128 GB 32, 64 GB
Storage type UFS 2.1 eMMC 5.1
Memory card MicroSD MicroSD
Memory card max. size Up to 512 GB Up to 512 GB

Benchmarks

Geekbench 5 (Single-Core)
Galaxy M31 +72%
327
Geekbench 5 (Multi-Core)
Galaxy M31 +13%
1262
AnTuTu Benchmark 7
108714
AnTuTu Benchmark 8
Galaxy M31 +47%
187485
127133

Software

Operating system Android 10 (Can be upgraded to Android 11) Android 10 (Can be upgraded to Android 11)
ROM One UI 3.1 One UI 3.0
OS size 15 GB 12 GB

Battery

Specifications
Capacity 6000 mAh 5000 mAh
Charge power 15 W 15 W
Battery type Li-Ion Li-Po
Replaceable No No
Wireless charging No No
Reverse charging No No
Fast charging Yes, Samsung Adaptive Fast Charge (45% in 60 min) Yes (50% in 60 min)
Full charging time 2:25 hr 2:10 hr

Battery life tests

Web browsing (Wi-Fi)
18:02 hr
Watching videos (Player)
17:29 hr
Talk (3G)
39:38 hr

Camera

Specs and camera test of smartphones
Main camera
Matrix 64 megapixels 48 megapixels
Image resolution 9248 x 6920 8000 x 6000
Zoom Digital Digital
Flash LED LED
Stabilization Digital Digital
8K video recording No No
4K video recording Up to 30FPS No
1080p video recording Up to 30FPS Up to 30FPS
Slow motion 240 FPS (720p) No
Angle of widest lens 123° 123°
Lenses 4 (64 MP + 8 MP + 5 MP + 5 MP) 4 (48 MP + 8 MP + 2 MP + 2 MP)
Wide (main) lens - 64 MP
- Aperture: f/1.8
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/1.72", ISOCELL Bright GW1 (ISOCELL CMOS)
- Phase autofocus
- 48 MP
- Aperture: f/2.0
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2.0" (CMOS)
- Phase autofocus
Ultra-wide lens - 8 MP
- Aperture: f/2.2
- Focal length: 12 mm
- Pixel size: 1.12 micron
- Sensor: 1/4.0" (CMOS)
- 8 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
- Sensor: 1/4.0" (CMOS)
Macro lens - 5 MP
- Aperture: f/2.2
- 2 MP
- Aperture: f/2.4
Depth lens - 5 MP
- Aperture: f/2.2
- Pixel size: 1.12 micron
- Sensor: 1/5.0" (CMOS)
- 2 MP
- Aperture: f/2.4
Camera features - Bokeh mode
- Pro mode
- Bokeh mode
Selfie camera
Megapixels 32 megapixels 13 megapixels
Image resolution 6528 x 4896 4128 x 3096
Aperture f/2.0 f/2.2
Focal length 26 mm -
Pixel size 0.8 microns 1.12 microns
Sensor type CMOS CMOS
Sensor size 1/2.8" 1/3.1"
Video resolution 2160p (4K) при 30 FPS 1080p (Full HD) при 30 FPS

Connectivity

Wi-Fi standard Wi-Fi 5 (802.11 a/b/g/n/ac) Wi-Fi 5 (802.11 a/b/g/n/ac)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
- Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 5
Bluetooth features PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP
USB type USB Type-C USB Type-C
USB version 2 2
USB features - Charging
- USB-Storage mode
- OTG
- Charging
- USB-Storage mode
- OTG
GPS GPS, GLONASS, Beidou, Galileo GPS, GLONASS, Beidou, Galileo
NFC* - Yes
Infrared port No No
Network
Number of SIM* 2 2
Type of SIM card Nano Nano
Multi SIM mode Standby Standby
eSIM support* No No
Hybrid slot No No
LTE Cat* 12 13
5G support No No

Sound

Speakers Mono Mono
Headphone audio jack Yes Yes
FM radio Yes Yes
Dolby Atmos Yes Yes
Speakers test
Max. loudness
81.7 dB
79.5 dB

Other

Category Mid-range Budget
Announced February 2020 May 2020
Release date March 2020 June 2020
Launch price ~ 250 USD ~ 200 USD
SAR (head) 0.48 W/kg 0.23 W/kg
SAR (body) 1.13 W/kg 1.38 W/kg
Sensors - Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
- Hall-effect sensor
- Proximity sensor
- Gyroscope
- Accelerometer
- Ambient light sensor
- Compass
- Fingerprint
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.

Conclusion

After analyzing all the data, we think that the Samsung Galaxy M31 is definitely a better buy.

Cast your vote

So, which phone would you choose?
41 (70.7%)
17 (29.3%)
Total votes: 58

User opinions

You can share your opinion or ask a question in the comments below
Avatar
Elder Ikawoolami 23 March 2021 18:12
I go for Samsung M31 is super perfect up up for Samsung
+1 Reply