Display
Size:
6.0 inches
6.4 inches
Resolution:
2160 x 1080 pixels, 18:9 ratio, 402 PPI
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI
Technology:
OLED
Super AMOLED
Screen-to-body:
76.19 %
83.97 %
Peak brightness:
420 cd/m2 (nit)
Features:
Scratch-resistant glass (Dragontrail), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Hardware
System chip:
Qualcomm Snapdragon 670 SDM670 (10 nm)
Exynos 9611 (10 nm)
Processor:
Octa-core, 2000 MHz, Kryo 360, 64-bit
Octa-core, 4x 2.3GHz Cortex-A73 + 4x 1.7GHz Cortex-A53, 64-bit
GPU:
Adreno 615
Mali-G72 MP3
RAM:
4GB LPDDR4
6GB LPDDR4
Internal storage:
64GB, not expandable
64GB (UFS 2.1), available to use: 49 GB
Storage expansion:
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
OS:
Android (12, 11, 10, 9.0 Pie)
Android (11, 10), Samsung One UI
Battery
Capacity:
3700 mAh
6000 mAh
Type:
Not user replaceable
Li - Polymer, Not user replaceable
Charging:
USB Power Delivery
Fast charging
Max charge speed:
Wired: 15.0W
Camera
Rear:
Single camera
Quad camera
Main camera:
12.2 MP (OIS, PDAF)
64 MP (PDAF)
Specifications:
Aperture size: F1.8; Focal length: 28 mm; Sensor size: 1/2.55"; 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:
8 MP (Ultra-wide)
Specifications:
Aperture size: F2.2; Focal Length: 12 mm; Sensor size: 1/4"; Pixel size: 1.12 μm
Third camera:
5 MP (Macro)
Specifications:
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:
Dual LED
LED
Video recording:
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
Features:
EIS
Hyperlapse, EIS
Front:
8 MP
32 MP (HDR, Slow-motion videos)
Video capture:
1920x1080 (Full HD)
1920x1080 (Full HD)
Design
Dimensions:
6.30 x 3.00 x 0.32 inches (160.1 x 76.1 x 8.2 mm)
6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)
Weight:
5.89 oz (167.0 g)
6.74 oz (191.0 g)
Materials:
Back: Plastic
Back: Plastic; Frame: Plastic
Biometrics:
Fingerprint (touch)
2D Face unlock, Fingerprint (touch)
Keys:
Right: Volume control, Lock/Unlock key
Colors:
Black, Purple, White
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), 17(700 b), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 32(1500 L-band), 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), 26(850+), 28(700 APT), 66(AWS-3)
4G (TDD):
Bands 38(2600), 40(2300), 41(2600+)
Bands 38(2600), 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 Cat 11 (600/75 Mbit/s), 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
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:
aptX-HD
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
5.0
Wi-Fi:
802.11 a, b, g, n, ac, dual-band; MIMO, 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, Mass storage device
Charging
Location:
GPS, A-GPS, Glonass, Galileo, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass, Barometer
Accelerometer, Gyroscope, Compass
Other:
NFC, VoIP, Tethering, Computer sync, OTA sync
NFC
Hearing aid compatible:
M3, T3
Regulatory Approval
FCC approval:
Date approved:
Feb 25, 2019
Feb 07, 2020
FCC ID value:
A4RG020
A3LSMM315F
Measured SAR:
Head:
1.33 W/kg
0.42 W/kg
Body:
1.18 W/kg
0.41 W/kg
Simultaneous Transmission:
1.59 W/kg
1.54 W/kg
Wireless Router:
1.18 W/kg
0.74 W/kg
Buyers information
Price:
$ 479
€ 240
User Manual:
This is the official Samsung Galaxy M31 User Guide in English provided from the manufacturer.
In The Box:
18W USB-C power adapter, 1M USB-C to USB-C cable (USB 2.0), Quick Start Guide, Quick Switch Adapter, SIM tool
15W fast charger, Data cable, Ejection pin, User Manual
Availability
Officially announced:
May 07, 2019
Feb 25, 2020
FCC OKs Cingular\'s purchase of AT&T Wireless