Display
Size:
6.4 inches
6.8 inches
Resolution:
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI
3088 x 1440 pixels, 19.3:9 ratio, 501 PPI
Technology:
Super AMOLED
Dynamic AMOLED
Refresh rate:
120Hz
Screen-to-body:
83.97 %
89.72 %
Peak brightness:
420 cd/m2 (nit)
1750 cd/m2 (nit)
Features:
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus+), Ambient light sensor, Proximity sensor
Hardware
System chip:
Exynos 9611 (10 nm)
Qualcomm Snapdragon 8 Gen 1 SM8450 (4 nm)
Processor:
Octa-core, 4x 2.3GHz Cortex-A73 + 4x 1.7GHz Cortex-A53, 64-bit
Octa-core, 1x 3.00GHz Cortex-X2 + 3x 2.50GHz Cortex-A710 + 4x 1.80GHz Cortex-A510
GPU:
Mali-G72 MP3
Adreno 730
RAM:
6GB LPDDR4
8GB LPDDR5
Internal storage:
64GB (UFS 2.1), available to use: 49 GB
128GB (UFS 3.1), not expandable
Storage expansion:
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
OS:
Android (11, 10), Samsung One UI
Android (13, 12)
Battery
Capacity:
6000 mAh
5000 mAh
Type:
Li - Polymer, Not user replaceable
Not user replaceable
Charging:
Fast charging
Fast charging, Qi wireless charging, Reverse wireless charging
Max charge speed:
Wired: 15.0W
Wired: 45.0W; Wireless: 15.0W
Camera
Rear:
Quad camera
Quad camera
Main camera:
64 MP (PDAF)
108 MP (OIS, PDAF)
Specifications:
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm
Aperture size: F1.8; Focal length: 23 mm; Sensor size: 1/1.33"; Pixel size: 0.8 μm
Second camera:
8 MP (Ultra-wide)
10 MP (Telephoto)
Specifications:
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Optical zoom: 10.0x; Aperture size: F4.9; Focal Length: 230 mm; Sensor size: 1/3.52"; Pixel size: 1.12 μm
Third camera:
5 MP (Macro)
10 MP (Telephoto)
Specifications:
Aperture size: F2.2; Focal Length: 25 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Optical zoom: 3.0x; Aperture size: F2.4; Focal Length: 69 mm; Sensor size: 1/3.52"; Pixel size: 1.12 μm
Fourth camera:
5 MP (Depth information)
12 MP (Ultra-wide)
Specifications:
Aperture size: F2.2
Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/2.55"; Pixel size: 1.4 μm
Flash:
LED
LED
Video recording:
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)
Features:
Hyperlapse, EIS
Front:
32 MP (HDR, Slow-motion videos)
40 MP (PDAF)
Video capture:
1920x1080 (Full HD)
3840x2160 (4K UHD) (60 fps)
Design
Dimensions:
6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)
6.43 x 3.07 x 0.35 inches (163.3 x 77.9 x 8.9 mm) , thickness with camera 0.41 inches (10.50 mm)
Weight:
6.74 oz (191.0 g)
8.08 oz (229.0 g)
Materials:
Back: Plastic; Frame: Plastic
Back: Glass (Corning Gorilla Glass Victus); Frame: Aluminum
Resistance:
Water, Dust; IP68
Biometrics:
2D Face unlock, Fingerprint (touch)
2D Face unlock, Ultrasonic in-screen fingerprint
Keys:
Right: Volume control, Lock/Unlock key
Left: Volume control, Lock/Unlock key
Colors:
Blue, Black, Red
Phantom Black, White, Burgundy, Green
Cellular
5G:
n1, n2, n3, n5, n7, n8, n12, n20, n25, n28, n38, n40, n41, n66, n71, n75, n77, n78, 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), 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), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 32(1500 L-band), 66(AWS-3), 71(600)
4G (TDD):
Bands 38(2600), 40(2300), 41(2600+)
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
LTE-A, HSDPA+ (4G) 42.2 Mbit/s
Dual SIM:
Yes
SIM type:
Nano SIM
Dual Nano SIM + eSIM
VoLTE:
Yes
Multimedia
Headphones:
3.5mm jack
No 3.5mm jack
Speakers:
Earpiece, Loudspeaker
Earpiece, Multiple speakers
Features:
Dolby Atmos
Screen mirroring:
Wireless screen share
Wireless screen share
Radio:
FM
Additional microphone(s):
for Noise cancellation
for Noise cancellation
Connectivity & Features
Bluetooth:
5.0
5.2
Wi-Fi:
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, ax (Wi-Fi 6); Wi-Fi Direct, Hotspot
USB:
Type-C (reversible), USB 2.0
Type-C (reversible), USB 3.2
Features:
Charging
Charging, OTG
Location:
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass, Barometer
Other:
NFC
NFC
Regulatory Approval
FCC approval:
Date approved:
Feb 07, 2020
FCC ID value:
A3LSMM315F
Measured SAR:
Head:
0.42 W/kg
Body:
0.41 W/kg
Simultaneous Transmission:
1.54 W/kg
Wireless Router:
0.74 W/kg
Buyers information
Price:
€ 240
$ 1200
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
UBS-C cable, User manual, SIM eject tool
Availability
Officially announced:
Feb 25, 2020
Feb 09, 2022