Display
Size:
6.4 inches
6.4 inches
Resolution:
3120 x 1440 pixels, 19.5:9 ratio, 537 PPI
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI
Technology:
P-OLED
Super AMOLED
Screen-to-body:
83.68 %
83.97 %
Peak brightness:
420 cd/m2 (nit)
Features:
HDR support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Hardware
System chip:
Qualcomm Snapdragon 845 SDM845 (10 nm)
Exynos 9611 (10 nm)
Processor:
Octa-core, 2800 MHz, Kryo 385, 64-bit
Octa-core, 4x 2.3GHz Cortex-A73 + 4x 1.7GHz Cortex-A53, 64-bit
GPU:
Adreno 630
Mali-G72 MP3
RAM:
6GB LPDDR4
6GB LPDDR4
Internal storage:
64GB, available to use: 47.58 GB
64GB (UFS 2.1), available to use: 49 GB
Storage expansion:
microSDXC up to 2000 GB
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
OS:
Android (9.0 Pie, 8.1 Oreo), LG UX UI
Android (11, 10), Samsung One UI
Battery
Capacity:
3300 mAh
6000 mAh
Type:
Li - Polymer, Not user replaceable
Li - Polymer, Not user replaceable
Charging:
Qualcomm Quick Charge 3.0, USB Power Delivery, Qi wireless charging
Fast charging
Max charge speed:
Wired: 15.0W
Camera
Rear:
Triple camera
Quad camera
Main camera:
12 MP (OIS, PDAF)
64 MP (PDAF)
Specifications:
Aperture size: F1.5; Focal length: 27 mm; Sensor size: 1/2.6"; Pixel size: 1.4 μm
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm
Second camera:
16 MP (Ultra-wide, PDAF, CMOS image sensor, BSI sensor)
8 MP (Ultra-wide)
Specifications:
Aperture size: F1.9; Focal Length: 16 mm; Sensor size: 1/3.09"; Pixel size: 1 μm
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Third camera:
12 MP (Telephoto, OIS, PDAF)
5 MP (Macro)
Specifications:
Optical zoom: 2.0x; Aperture size: F2.4; Focal Length: 52 mm; Sensor size: 1/3.4"; Pixel size: 1 μm
Aperture size: F2.2; Focal Length: 25 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Fourth camera:
5 MP (Depth information)
Specifications:
Aperture size: F2.2
Flash:
LED
LED
Video recording:
3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
Features:
OIS, HDR, Time-lapse video, EIS, Video calling, Video sharing
Hyperlapse, EIS
Front:
8 MP (Dual-Camera, Wide Angle)
32 MP (HDR, Slow-motion videos)
Video capture:
1920x1080 (Full HD)
1920x1080 (Full HD)
Design
Dimensions:
6.25 x 2.98 x 0.3 inches (158.8 x 75.7 x 7.6 mm)
6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)
Weight:
5.96 oz (169.0 g)
6.74 oz (191.0 g)
Materials:
Back: Glass (Corning Gorilla Glass 5); Frame: Aluminum
Back: Plastic; Frame: Plastic
Resistance:
Water, Dust, Shock; IP68; MIL-STD-810 certified
Biometrics:
2D Face unlock, Fingerprint (touch)
2D Face unlock, Fingerprint (touch)
Keys:
Left: Volume control, Other; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Aurora black, Moroccan blue
Blue, Black, Red
Cellular
4G (FDD):
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 17(700 b), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)
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)
4G (TDD):
Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46
Bands 38(2600), 40(2300), 41(2600+)
3G:
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed:
LTE-A Pro Cat 16 (1000/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS
LTE-A, 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, Multiple speakers
Earpiece, Loudspeaker
Features:
32-Bit DAC, DTS:X Virtual Surround, aptX-HD
Dolby Atmos
Screen mirroring:
DLNA, Wireless screen share, MirrorLink
Wireless screen share
Radio:
FM
Additional microphone(s):
for Noise cancellation, Video recording
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 3.1
Type-C (reversible), USB 2.0
Features:
Charging, Mass storage device
Charging
Location:
GPS, A-GPS, S-GPS
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass
Other:
NFC, VoIP, Tethering, Computer sync, OTA sync
NFC
Hearing aid compatible:
M4, T3
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:
$ 900
€ 240
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
Availability
Officially announced:
Oct 03, 2018
Feb 25, 2020