LG K31 vs Samsung Galaxy A42 Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.

LG K31 Samsung Galaxy A42
Released · Aug 21, 2020
Released · Nov 06, 2020
5.7-inch · 1520 x 720 px
6.6-inch · 1600 x 720 px
13 MP Main · 5 MP Selfie
48 MP Main · 20 MP Selfie
2GB · 32GB
4GB · 128GB
3000 mAh
5000 mAh

Display

Size
5.7-inch 6.6-inch
Resolution
1520 x 720 px, 19:9 ratio, 295 PPI 1600 x 720 px, 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
Device type
Smartphone Smartphone

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)
Specifications:
Aperture size: F1.8
Sensor size: 1/3"
Pixel size: 1.12 μm
48 MP (PDAF)
Specifications:
Aperture size: F1.8
Pixel size: 0.8 μm
Second camera
5 MP (Ultra-wide)
Specifications:
Aperture size: F2.2
Sensor size: 1/5"
Pixel size: 1.12 μm
8 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
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
FCC OKs Cingular\'s purchase of AT&T Wireless