Display
Size:
5.5 inches
6.4 inches
Resolution:
2560 x 1440 pixels, 16:9 ratio, 534 PPI
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI
Technology:
AMOLED
Super AMOLED
Screen-to-body:
71.22 %
83.97 %
Peak brightness:
420 cd/m2 (nit)
Features:
Oleophobic coating, Scratch-resistant glass (Corning Gorilla Glass 4), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Hardware
System chip:
Qualcomm Snapdragon 821 MSM8996 Pro
Exynos 9611 (10 nm)
Processor:
Quad-core, 2150 MHz, Kryo, 64-bit
Octa-core, 4x 2.3GHz Cortex-A73 + 4x 1.7GHz Cortex-A53, 64-bit
GPU:
Adreno 530
Mali-G72 MP3
RAM:
4GB 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 (10, 9.0 Pie, 8.1 Oreo, 8.0 Oreo, 7.1 Nougat)
Android (11, 10), Samsung One UI
Battery
Capacity:
3450 mAh
6000 mAh
Type:
Li - Ion, 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:
12.3 MP (Laser and PDAF)
64 MP (PDAF)
Specifications:
Aperture size: F2.0; Sensor size: 1/2.3"; Pixel size: 1.55 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:
Video calling, Video sharing
Hyperlapse, EIS
Front:
8 MP
32 MP (HDR, Slow-motion videos)
Video capture:
1920x1080 (Full HD)
1920x1080 (Full HD)
Design
Dimensions:
6.09 x 2.98 x 0.34 inches (154.72 x 75.74 x 8.6 mm)
6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)
Weight:
5.93 oz (168.0 g)
6.74 oz (191.0 g)
Materials:
Back: Aluminum, Glass
Back: Plastic; Frame: Plastic
Resistance:
Splash, Dust; IP53
Biometrics:
Fingerprint (touch)
2D Face unlock, Fingerprint (touch)
Features:
Notification light
Keys:
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Black, Gray, 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), 17(700 b), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS)
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 41(2600+)
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 Cat 11 (600/75 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA, 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, Loudspeaker
Earpiece, Loudspeaker
Features:
Album art cover, Background playback
Dolby Atmos
Screen mirroring:
Wireless screen share
Radio:
FM
Additional microphone(s):
for Noise cancellation
for Noise cancellation
Connectivity & Features
Bluetooth:
4.2
5.0
Wi-Fi:
802.11 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 3.0
Type-C (reversible), USB 2.0
Features:
Mass storage device, OTG, Charging
Charging
Location:
GPS, A-GPS, Glonass
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer
Accelerometer, Gyroscope, Compass
Other:
NFC, UMA (Wi-Fi Calling), Tethering, Computer sync, OTA sync
NFC
Hearing aid compatible:
M4, T4
Regulatory Approval
FCC approval:
Date approved:
Feb 12, 2017
Feb 07, 2020
FCC ID value:
NM8G-2PW2100
A3LSMM315F
Measured SAR:
Head:
0.89 W/kg
0.42 W/kg
Measured in:
1900 MHz
Body:
0.56 W/kg
0.41 W/kg
Measured in:
1900 MHz
Simultaneous Transmission:
1.15 W/kg
1.54 W/kg
Wireless Router:
0.56 W/kg
0.74 W/kg
Buyers information
Price:
$ 869
€ 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 04, 2016
Feb 25, 2020
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