Display
Size:
5.6 inches
6.5 inches
Resolution:
1480 x 720 pixels, 18.5:9 ratio, 294 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI
Technology:
Super AMOLED
Super AMOLED
Screen-to-body:
74.94 %
86.06 %
Features:
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:
Samsung Exynos 7 Octa 7884
Samsung 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: 22.1 GB
128GB (UFS 2.1), available to use: 106.4 GB
Storage expansion:
microSDXC up to 400 GB
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
OS:
Android (10, 8.0 Oreo), Samsung One UI
Android (11, 10), Samsung One UI
Battery
Capacity:
3000 mAh
6000 mAh
Type:
Li - Ion, Not user replaceable
Not user replaceable
Charging:
Fast charging, Reverse charging
Max charge speed:
Wired: 25.0W
Camera
Rear:
Single camera
Quad camera
Main camera:
16 MP (PDAF, CMOS image sensor)
64 MP (PDAF)
Specifications:
Aperture size: F1.7; Focal length: 26 mm; Sensor size: 1/2.8"; 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:
12 MP (Ultra-wide)
Specifications:
Aperture size: F2.2
Third camera:
5 MP (Macro)
Specifications:
Aperture size: F2.4
Fourth camera:
5 MP (Depth information)
Specifications:
Aperture size: F2.4
Video recording:
1920x1080 (Full HD) (30 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (480 fps)
Features:
Video calling, Video sharing
Hyperlapse, EIS
Front:
16 MP (Flash)
32 MP
Video capture:
1920x1080 (Full HD)
3840x2160 (4K UHD) (30 fps)
Design
Dimensions:
5.90 x 2.79 x 0.30 inches (149.9 x 70.8 x 7.7 mm)
6.27 x 2.93 x 0.37 inches (159.3 x 74.4 x 9.3 mm)
Weight:
5.71 oz (162.0 g)
7.16 oz (203.0 g)
Materials:
Back: Metal
Biometrics:
2D Face unlock, Fingerprint (touch)
Fingerprint (touch)
Keys:
Left: Volume control; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Black, Gold, Lavender, Blue
Mirage black, Mirage blue
Cellular
LTE (FDD):
Bands 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 12(700 a), 14(700 PS)
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), 26(850+), 28(700 APT), 66(AWS-3)
LTE (TDD):
Bands 38(2600), 40(2300), 41(2600+)
UMTS:
Bands 5(850), 2(1900), 1(2100)
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed:
LTE-A Cat 6 (300/50 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
Multimedia
Headphones:
3.5mm jack
3.5mm jack
Speakers:
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features:
Dolby Atmos, Album art cover, Background playback
Screen mirroring:
Wireless screen share
Wireless screen share
Radio:
FM, Recording option
FM
Additional microphone(s):
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:
microUSB, USB 2.0
Type-C (reversible), USB 2.0
Features:
Charging, Mass storage device
Charging, OTG
Location:
GPS, A-GPS, Glonass
GPS, A-GPS, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass, Hall (for flip covers)
Accelerometer, Gyroscope, Compass
Other:
NFC, ANT+, VoIP, Tethering, Computer sync, OTA sync
NFC
Hearing aid compatible:
M3, T3
Regulatory Approval
Measured SAR:
Head:
0.36 W/kg
Body:
1.40 W/kg
Simultaneous Transmission:
1.57 W/kg
Wireless Router:
1.40 W/kg
Buyers information
Price:
$ 360
€ 310
User Manual:
This is the official Samsung Galaxy M31s User Guide in English provided from the manufacturer.
In The Box:
Charger, microUSB cable, Headset and Documentation
Availability
Officially announced:
May 02, 2018
Jul 30, 2020
