Display
Size:
6.4 inches
6.4 inches
Resolution:
2400 x 1080 pixels, 20:9 ratio, 409 PPI
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI
Technology:
Super AMOLED
Super AMOLED
Screen-to-body:
84.33 %
83.97 %
Peak brightness:
420 cd/m2 (nit)
Features:
Scratch-resistant glass (Corning Gorilla Glass 6), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Hardware
System chip:
Qualcomm Snapdragon 675 SM6150
Exynos 9611
Processor:
Octa-core, 2000 MHz, Kryo 460, 64-bit, 11 nm
Octa-core, 2300 MHz, Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm
GPU:
Adreno 612
Mali-G72 MP3
RAM:
8GB LPDDR4
6GB LPDDR4
Internal storage:
128GB, not expandable
64GB (UFS 2.1), available to use: 49 GB
Storage expansion:
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
OS:
Android (9.0 Pie), Funtouch UI
Android (11, 10), Samsung One UI
Battery
Capacity:
4100 mAh
6000 mAh
Type:
Not user replaceable
Li - Polymer, Not user replaceable
Charging:
Fast charging
Fast charging
Max charge speed:
Wired: 15.0W
Camera
Rear:
Quad camera
Quad camera
Main camera:
48 MP (PDAF)
64 MP (PDAF)
Specifications:
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm
Second camera:
13 MP (Telephoto, PDAF)
8 MP (Ultra-wide)
Specifications:
Optical zoom: 2.0x; Sensor size: 1/3.1"; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Third camera:
8 MP (Ultra-wide)
5 MP (Macro)
Specifications:
Aperture size: F2.2; Focal Length: 16 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Aperture size: F2.2; Focal Length: 25 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Fourth camera:
2 MP (Depth information)
5 MP (Depth information)
Specifications:
Aperture size: F2.4; Sensor size: 1/5"; Pixel size: 1.75 μm
Aperture size: F2.2
Video recording:
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (30 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
Features:
Hyperlapse, EIS
Front:
32 MP (Pop-up, Dual-Camera, Wide Angle)
32 MP (HDR, Slow-motion videos)
Video capture:
1920x1080 (Full HD)
1920x1080 (Full HD)
Design
Dimensions:
6.26 x 2.94 x 0.39 inches (159 x 74.70 x 9.80 mm)
6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)
Weight:
7.12 oz (201.8 g)
6.74 oz (191.0 g)
Materials:
Back: Glass (Corning Gorilla Glass 6); Frame: Plastic
Back: Plastic; Frame: Plastic
Biometrics:
In-screen fingerprint
2D Face unlock, Fingerprint (touch)
Keys:
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Crystal black, Crystal sky
Blue, Black, Red
Cellular
LTE (FDD):
Bands 1(2100), 3(1800), 5(850), 8(900)
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)
LTE (TDD):
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)
UMTS:
Bands 5(850), 8(900), 1(2100)
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Data Speed:
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM:
Yes
Yes
SIM type:
Nano SIM
Nano SIM
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
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, OTG
Charging
Location:
GPS, A-GPS, Glonass, BeiDou, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass
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
User Manual:
This is the official Samsung Galaxy M31 User Guide in English provided from the manufacturer.
In The Box:
Earphone, Documentation, USB Cable, USB Power, Adapter, SIM Ejector, Protective Case, Protective Film (applied)
15W fast charger, Data cable, Ejection pin, User Manual
Availability
Officially announced:
Feb 25, 2020
FCC OKs Cingular\'s purchase of AT&T Wireless