Display
Size:
6.4 inches
6.5 inches
Resolution:
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI
1600 x 720 pixels, 20:9 ratio, 270 PPI
Technology:
Super AMOLED
IPS LCD
Screen-to-body:
83.97 %
79.20 %
Peak brightness:
420 cd/m2 (nit)
Features:
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
60Hz refresh rate, Ambient light sensor, Proximity sensor
Hardware
System chip:
Exynos 9611
Mediatek Helio P35
Processor:
Octa-core, 2300 MHz, Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm
Octa-core, 2300 MHz, Arm Cortex-A53, 64-bit, 12 nm
GPU:
Mali-G72 MP3
PowerVR GE8320
RAM:
6GB LPDDR4
3GB LPDDR4
Internal storage:
64GB (UFS 2.1), available to use: 49 GB
32GB (eMMC 5.1), available to use: 19.8 GB
Storage expansion:
microSDXC up to 512 GB
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
OS:
Android (10), Samsung One UI
Android (10), Samsung One UI
Battery
Capacity:
6000 mAh
4000 mAh
Type:
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Charging:
Fast charging
Fast charging
Max charge speed:
Wired: 15.0W
Wired: 15.0W
Camera
Rear:
Quad camera
Quad camera
Main camera:
64 MP (PDAF)
16 MP (PDAF)
Specifications:
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm
Aperture size: F1.8; Sensor size: 1/3.06"; Pixel size: 1 μm
Second camera:
8 MP (Ultra-wide)
8 MP (Ultra-wide)
Specifications:
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Aperture size: F2.2; Sensor size: 1/4"; Pixel size: 1.12 μm
Third camera:
5 MP (Macro)
2 MP (Macro)
Specifications:
Aperture size: F2.2; Focal Length: 25 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.4
Fourth camera:
5 MP (Depth information)
2 MP (Depth information)
Specifications:
Aperture size: F2.2
Aperture size: F2.4
Video recording:
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
1920x1080 (Full HD) (30 fps)
Features:
Hyperlapse, EIS
Front:
32 MP (HDR, Slow-motion videos)
13 MP
Video capture:
1920x1080 (Full HD)
1920x1080 (Full HD)
Design
Dimensions:
6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)
6.61 x 3.02 x 0.32 inches (167.8 x 76.7 x 8.1 mm)
Weight:
6.74 oz (191.0 g)
6.81 oz (193.0 g)
Materials:
Back: Plastic; Frame: Plastic
Back: Plastic; Frame: Plastic
Biometrics:
2D Face unlock, Fingerprint (touch)
Fingerprint (touch)
Keys:
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Blue, Black, Red
Black
Cellular
LTE (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)
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), 25(1900+), 26(850+), 28(700 APT), 66(AWS-3), 71(600)
LTE (TDD):
Bands 38(2600), 40(2300), 41(2600+)
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
UMTS:
850, 900, 1700/2100, 1900, 2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz
Data Speed:
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM:
Yes
SIM type:
Nano SIM
Nano SIM
HD Voice:
Yes
VoLTE:
Yes
Multimedia
Headphones:
3.5mm jack
3.5mm jack
Speakers:
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features:
Dolby Atmos
Screen mirroring:
Wireless screen share
Wireless screen share
Radio:
FM
FM
Additional microphone(s):
for Noise cancellation
Connectivity & Features
Bluetooth:
5.0
5.0
Wi-Fi:
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
USB:
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0
Features:
Charging
Charging
Location:
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass
Other:
NFC
NFC
Hearing aid compatible:
M4, T3
Regulatory Approval
FCC approval:
Date approved:
Feb 07, 2020
Apr 17, 2020
Measured SAR:
Head:
0.42 W/kg
0.42 W/kg
Body:
0.41 W/kg
1.27 W/kg
Simultaneous Transmission:
1.54 W/kg
1.27 W/kg
Wireless Router:
0.74 W/kg
1.27 W/kg
Buyers information
Price:
€ 240
$ 250
User Manual:
This is the official Samsung Galaxy M31 User Guide in English provided from the manufacturer.
In The Box:
15W fast charger, Data cable, Ejection pin, User Manual
This is the official Samsung Galaxy A21 User Guide in English provided from the manufacturer.
Availability
Officially announced:
Feb 25, 2020
Apr 08, 2020
