Display
Size:
5.6 inches
6.4 inches
Resolution:
1480 x 720 pixels, 18.5:9 ratio, 294 PPI
2340 x 1080 pixels, 19.5:9 ratio, 403 PPI
Technology:
Super AMOLED
Super AMOLED
Screen-to-body:
76.02 %
83.97 %
Colors:
16 777 216
Peak brightness:
420 cd/m2 (nit)
Features:
Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Hardware
System chip:
Samsung Exynos 7 Octa 7870
Exynos 9611
Processor:
Octa-core, 1600 MHz, ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2300 MHz, Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm
GPU:
Mali-T830 MP1
Mali-G72 MP3
RAM:
3GB LPDDR3
6GB LPDDR4
Internal storage:
32GB, available to use: 22.6 GB
64GB (UFS 2.1), available to use: 49 GB
Storage expansion:
microSDXC up to 256 GB
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
OS:
Android (9.0 Pie, 8.0 Oreo), Samsung One UI
Android (11, 10), Samsung One UI
Battery
Capacity:
3000 mAh
6000 mAh
Type:
Not user replaceable
Li - Polymer, Not user replaceable
Charging:
Fast charging
Max charge speed:
Wired: 15.0W
Camera
Rear:
Single camera
Quad camera
Main camera:
13 MP (PDAF)
64 MP (PDAF)
Specifications:
Aperture size: F1.9; Focal length: 27 mm; Sensor size: 1/3.06"; Pixel size: 1.12 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
Video recording:
1920x1080 (Full HD) (30 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD), 1280x720 (HD) (240 fps)
Features:
Video calling, Video sharing
Hyperlapse, EIS
Front:
8 MP (Flash)
32 MP (HDR, Slow-motion videos)
Video capture:
1920x1080 (Full HD)
Design
Dimensions:
5.88 x 2.76 x 0.32 inches (149.3 x 70.2 x 8.2 mm)
6.27 x 2.96 x 0.35 inches (159.2 x 75.1 x 8.9 mm)
Weight:
5.43 oz (154.0 g)
6.74 oz (191.0 g)
Materials:
Back: Plastic
Back: Plastic; Frame: Plastic
Biometrics:
2D Face unlock, Fingerprint (touch)
2D Face unlock, Fingerprint (touch)
Keys:
Left: Volume control; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Black, Gold, Purple, Blue
Blue, Black, Red
Cellular
LTE (FDD):
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 17(700 b), 20(800 DD), 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)
LTE (TDD):
Bands 38(2600), 40(2300)
Bands 38(2600), 40(2300), 41(2600+)
UMTS:
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Data Speed:
LTE Cat 4 (150/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, HSUPA
LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM:
Yes
SIM type:
Nano SIM
Nano SIM
VoLTE:
Yes
Yes
Multimedia
Headphones:
3.5mm jack
3.5mm jack
Speakers:
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features:
Album art cover, Background playback, Dolby Atmos
Dolby Atmos
Screen mirroring:
Wireless screen share
Wireless screen share
Radio:
FM
FM
Additional microphone(s):
for Noise cancellation
Connectivity & Features
Bluetooth:
4.2
5.0
Wi-Fi:
802.11 b, g, n; Hotspot, Wi-Fi Direct
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
USB:
microUSB, USB 2.0
Type-C (reversible), USB 2.0
Features:
Mass storage device, Charging
Charging
Location:
GPS, A-GPS, Glonass, BeiDou
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Hall (for flip covers)
Accelerometer, Gyroscope, Compass
Other:
NFC, VoIP, Tethering, Computer sync, OTA sync
NFC
Phone features
Notifications:
Haptic feedback, Music ringtones, Vibration, Flight mode, Silent mode, Speakerphone
Other features:
Voice dialing, Voice commands, Voice recording
Regulatory Approval
FCC approval:
Date approved:
Apr 17, 2018
Feb 07, 2020
Measured SAR:
Head:
1.18 W/kg
0.42 W/kg
Body:
0.76 W/kg
0.41 W/kg
Simultaneous Transmission:
1.57 W/kg
1.54 W/kg
Wireless Router:
1.30 W/kg
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:
Charger, microUSB cable, headset, Quick start guide, warranty cardand SIM ejector tool.
15W fast charger, Data cable, Ejection pin, User Manual
Availability
Officially announced:
May 21, 2018
Feb 25, 2020
