Display
Size:
5.8 inches
6.5 inches
6.4 inches
Resolution:
2340 x 1080 pixels, 19.5:9 ratio, 444 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI
2400 x 1080 pixels, 20:9 ratio, 409 PPI
Technology:
OLED
Super AMOLED
AMOLED
Screen-to-body:
82.53 %
86.06 %
86.20 %
Features:
60Hz refresh rate, HDR video support, Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor
90Hz refresh rate, HDR video support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor
Hardware
System chip:
Qualcomm Snapdragon 730 SM7150-AA
Samsung Exynos 9611
Snapdragon 765G SM7250-AB
Processor:
Octa-core, 2200 MHz, Kryo 470, 64-bit, 8 nm
Octa-core, 2300 MHz, Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm
Octa-core, 2400 MHz, Kryo 475, 64-bit, 7 nm
GPU:
Adreno 618
Mali-G72 MP3
Adreno 620
RAM:
6GB LPDDR4
6GB LPDDR4
8GB LPDDR4
Internal storage:
128GB, not expandable
128GB (UFS 2.1), available to use: 106.4 GB
128GB (UFS 2.1), not expandable
Storage expansion:
microSDXC up to 512 GB
Device type:
Smartphone
Smartphone
Smartphone
OS:
Android (11, 10)
Android (10), Samsung One UI
Android (10)
Battery
Capacity:
3140 mAh
6000 mAh
4115 mAh
Type:
Li - Polymer, Not user replaceable
Not user replaceable
Li - Polymer, Not user replaceable
Charging:
USB Power Delivery
Fast charging, Reverse charging
OnePlus Warp Charge
Max charge speed:
Wired: 18.0W
Wired: 25.0W
Wired: 30.0W
Camera
Rear:
Single camera
Quad camera
Quad camera
Main camera:
12.2 MP (OIS, PDAF)
64 MP (PDAF)
48 MP (OIS, PDAF)
Specifications:
Aperture size: F1.7; Focal length: 27 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
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/2"; Pixel size: 0.8 μm
Second camera:
12 MP (Ultra-wide)
8 MP (Ultra-wide)
Specifications:
Aperture size: F2.2
Aperture size: F2.2
Third camera:
5 MP (Macro)
2 MP (Macro)
Specifications:
Aperture size: F2.4
Aperture size: F2.4
Fourth camera:
5 MP (Depth information)
5 MP (Depth information)
Specifications:
Aperture size: F2.4
Aperture size: F2.4
Video recording:
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (240 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (120 fps), 1280x720 (HD) (480 fps)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (240 fps)
Features:
EIS
Hyperlapse, EIS
Time-lapse video, EIS
Front:
8 MP
32 MP
32 MP (Dual-Camera, EIS, HDR)
Video capture:
1920x1080 (Full HD)
3840x2160 (4K UHD) (30 fps)
3840x2160 (4K UHD) (30 fps)
Design
Dimensions:
5.67 x 2.73 x 0.32 inches (144 x 69.4 x 8.2 mm)
6.27 x 2.93 x 0.37 inches (159.3 x 74.4 x 9.3 mm)
6.23 x 2.89 x 0.32 inches (158.3 x 73.3 x 8.2 mm)
Weight:
5.04 oz (143.0 g)
7.16 oz (203.0 g)
6.49 oz (184.0 g)
Materials:
Back: Plastic; Frame: Plastic
Back: Glass (Corning Gorilla Glass 5); Frame: Plastic
Biometrics:
Fingerprint (touch)
Fingerprint (touch)
2D Face unlock, In-screen fingerprint
Keys:
Right: Volume control, Lock/Unlock key
Right: Volume control, Lock/Unlock key
Left: Volume control; Right: Lock/Unlock key
Colors:
Just black
Mirage black, Mirage blue
Blue marble, Gray onyx
Cellular
5G:
n1, n3, n7, n28, n78, SA, NSA
LTE (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), 18(800 Lower), 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), 17(700 b), 20(800 DD), 26(850+), 28(700 APT), 66(AWS-3)
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 17(700 b), 18(800 Lower), 19(800 Upper), 20(800 DD), 26(850+), 28(700 APT), 32(1500 L-band), 66(AWS-3)
LTE (TDD):
Bands 38(2600), 39(1900+), 40(2300), 41(2600+)
Bands 38(2600), 40(2300), 41(2600+)
Bands 34(2000), 38(2600), 39(1900+), 40(2300), 41(2600+)
UMTS:
850, 900, 1700/2100, 1900, 2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz
800, 850, 900, 1700/2100, 1900, 2100 MHz
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
LTE-A Pro Cat 18 (1200/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM:
Yes
Yes
Yes
SIM type:
Nano SIM, eSIM
Nano SIM
Nano SIM
Multimedia
Headphones:
3.5mm jack
3.5mm jack
No 3.5mm jack
Speakers:
Earpiece, Multiple speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Features:
aptX, aptX-HD
aptX, aptX-HD
Screen mirroring:
Wireless screen share
Wireless screen share
Wireless screen share
Radio:
FM
Additional microphone(s):
for Noise cancellation
for Noise cancellation
Connectivity & Features
Bluetooth:
5.1
5.0
5.1
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
802.11 a, b, g, n, ac, dual-band; MIMO, Wi-Fi Direct, Hotspot
USB:
Type-C (reversible), USB 3.1
Type-C (reversible), USB 2.0
Type-C (reversible), USB 2.0
Features:
Charging
Charging, OTG
Charging, Headphones port, OTG
Location:
GPS, A-GPS, Glonass, Galileo, Cell ID, Wi-Fi positioning
GPS, A-GPS, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Dual-band positioning, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer, Gyroscope, Compass, Barometer
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass
Other:
NFC
NFC
NFC
Hearing aid compatible:
M3, T4
Regulatory Approval
Measured SAR:
Head:
1.18 W/kg
Body:
1.19 W/kg
Simultaneous Transmission:
1.59 W/kg
Wireless Router:
1.00 W/kg
Buyers information
Price:
$ 349
€ 310
€ 399
User Manual:
This is the official Samsung Galaxy M31s User Guide in English provided from the manufacturer.
In The Box:
18W USB-C power adapter, 1 m USB-C to USB-C cable (USB 2.0), Quick Start Guide, Quick Switch Adapter, SIM tool
Screen protector (pre-applied), Warp Charge 30 power adapter, Warp Type-C cable (Support USB 2.0), Quick start guide, Welcome letter, Safety information and warranty card, Brand sticker, Phone case, SIM tray ejector, Highest SAR value card
Availability
Officially announced:
Aug 03, 2020
Jul 30, 2020
Jul 21, 2020