Display
Size:
5.7 inches
6.6 inches
Resolution:
1520 x 720 pixels, 19:9 ratio, 295 PPI
1600 x 720 pixels, 20:9 ratio, 266 PPI
Technology:
IPS LCD
Super AMOLED
Refresh rate:
60Hz
Screen-to-body:
77.13 %
84.26 %
Features:
Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor
Hardware
System chip:
MediaTek Helio P22 MT6762 (12 nm)
Qualcomm Snapdragon 750G SM7225 (8 nm)
Processor:
Octa-core, 2000 MHz, Arm Cortex-A53, 64-bit
Octa-core, 2x 2.2GHz Kryo 570 + 6x 1.8GHz Kryo 570, 64-bit
GPU:
IMG PowerVR GE8320
Adreno 619
RAM:
2GB
4GB LPDDR4
Internal storage:
32GB, available to use: 17 GB
128GB, available to use: 106 GB
Storage expansion:
microSDXC up to 32 GB
microSDXC up to 1000 GB
Device type:
Smartphone
Smartphone
OS:
Android (10)
Android (12, 11, 10), Samsung One UI
Battery
Capacity:
3000 mAh
5000 mAh
Type:
Not user replaceable
Not user replaceable
Charging:
Samsung Adaptive Fast Charging
Max charge speed:
Wired: 15.0W
Camera
Rear:
Dual camera
Quad camera
Main camera:
13 MP (PDAF)
48 MP (PDAF)
Specifications:
Aperture size: F1.8; Sensor size: 1/3"; Pixel size: 1.12 μm
Aperture size: F1.8; Pixel size: 0.8 μm
Second camera:
5 MP (Ultra-wide)
8 MP (Ultra-wide)
Specifications:
Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm
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
Flash:
LED
LED
Video recording:
1920x1080 (Full HD) (30 fps)
3840x2160 (4K UHD) (30 fps), 1280x720 (HD) (480 fps)
Front:
5 MP
20 MP (Autofocus)
Video capture:
1920x1080 (Full HD)
Design
Dimensions:
5.82 x 2.8 x 0.34 inches (147.8 x 71.1 x 8.6 mm)
6.47 x 2.99 x 0.34 inches (164.4 x 75.9 x 8.6 mm)
Weight:
5.15 oz (146.0 g)
6.81 oz (193.0 g)
Materials:
Back: Plastic; Frame: Plastic
Resistance:
Yes; MIL-STD-810 certified
Biometrics:
Fingerprint (touch)
In-screen fingerprint
Keys:
Left: Volume control; Right: Lock/Unlock key
Right: Volume control, Lock/Unlock key
Colors:
Silver
Prism Dot black, Prism Dot white, Prism Dot grey
Cellular
5G:
n1, n3, n5, n7, n8, n28, Sub-6
4G (FDD):
Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 25(1900+), 26(850+), 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), 28(700 APT)
4G (TDD):
Bands 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 7 (300/100 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:
Shared with microSD
SIM type:
Nano SIM
Nano SIM
HD Voice:
Yes
Multimedia
Headphones:
3.5mm jack
3.5mm jack
Speakers:
Earpiece, Loudspeaker
Earpiece, Loudspeaker
Screen mirroring:
Wireless screen share
Wireless screen share
Radio:
FM
Additional microphone(s):
for Noise cancellation
Connectivity & Features
Bluetooth:
5.0
5.0
Wi-Fi:
802.11 b, g, n; 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
Charging
Location:
GPS, A-GPS, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors:
Accelerometer
Accelerometer, Gyroscope, Compass
Other:
UMA (Wi-Fi Calling)
NFC
Hearing aid compatible:
M3, T3
Regulatory Approval
FCC approval:
Date approved:
Sep 14, 2020
Apr 08, 2021
FCC ID value:
ZNFK300AM
A3LSMA426U
Measured SAR:
Head:
0.47 W/kg
1.11 W/kg
Body:
0.91 W/kg
1.25 W/kg
Simultaneous Transmission:
1.26 W/kg
1.59 W/kg
Wireless Router:
1.02 W/kg
1.06 W/kg
Phablet:
3.81 W/kg
Buyers information
Price:
$ 150
€ 340
User Manual:
This is the official LG K31 User Guide in English provided from the manufacturer.
This is the official Samsung Galaxy A42 User Guide in English provided from the manufacturer.
In The Box:
Travel Adapter, USB Cable
Availability
Officially announced:
Sep 02, 2020