LG K31 vs Samsung Galaxy A42 Specs Comparison

Display

Size
5.7-inch	6.6-inch
Resolution
1520x720px, 19:9 ratio, 295 PPI	1600x720px, 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
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) Aperture size: F1.8 Sensor size: 1/3" Pixel size: 1.12 μm	48 MP (PDAF) Aperture size: F1.8 Pixel size: 0.8 μm
Second camera
5 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/5" Pixel size: 1.12 μm	8 MP (Ultra-wide) Aperture size: F2.2
Third camera
	5 MP (Macro) Aperture size: F2.4
Fourth camera
	5 MP (Depth information) 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, Video capture: 1920x1080 (Full HD)	20 MP (Autofocus)

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)	Optical 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
	Bands 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
	Yes
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)
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, Features: Charging	Type-C (reversible), USB 2.0, Features: Charging
Hearing aid compatible
M3/T3
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

Regulatory Approval

FCC approval
Date approved: Sep 14, 2020 FCC ID value: ZNFK300AM	Date approved: Apr 08, 2021 FCC ID value: A3LSMA426U
Measured SAR
Head: 0.47 W/kg Body: 0.91 W/kg Simultaneous Transmission: 1.26 W/kg Wireless Router: 1.02 W/kg	Head: 1.11 W/kg Body: 1.25 W/kg Simultaneous Transmission: 1.59 W/kg Wireless Router: 1.06 W/kg Phablet: 3.81 W/kg

Buyers information

MSRP
$ 150	€ 340
In The Box
Travel Adapter, USB Cable

Availability

Officially announced
	Sep 02, 2020

Links

Full specifications
LG K31 Specs	Samsung Galaxy A42 Specs