Samsung Galaxy A40 vs LG K31 Specs Comparison

Design

Dimensions
5.69 x 2.72 x 0.31 inches 144.4 x 69.2 x 7.9 mm	5.82 x 2.8 x 0.34 inches 147.8 x 71.1 x 8.6 mm
Weight
4.94 oz (140.0 g)	5.15 oz (146.0 g)
Materials
Back: Plastic Frame: Plastic	Back: Plastic Frame: Plastic
Resistance
	Yes; MIL-STD-810 certified
Biometrics
2D Face unlock, Fingerprint (touch)	Fingerprint (touch)
Keys
Right: Volume control, Lock/Unlock key	Left: Volume control; Right: Lock/Unlock key
Colors
Black, Coral, Blue, White	Silver

Display

Size
5.9-inch	5.7-inch
Resolution
2340x1080px, 19.5:9 ratio, 437 PPI	1520x720px, 19:9 ratio, 295 PPI
Technology
Super AMOLED	IPS LCD
Screen-to-body
85.73 %	77.13 %
Features
Scratch-resistant glass (Corning Gorilla Glass 3), Ambient light sensor, Proximity sensor	Ambient light sensor, Proximity sensor

Hardware

System chip
Exynos 7904 (14 nm)	MediaTek Helio P22 MT6762 (12 nm)
Processor
Octa-core 1800 MHz ARM Cortex-A73 and ARM Cortex-A53	Octa-core 2000 MHz Arm Cortex-A53
GPU
Mali-G71 MP2	IMG PowerVR GE8320
RAM
4GB (LPDDR4)	2GB
Internal storage
64GB, available to use: 49.4 GB	32GB, available to use: 17 GB
Storage expansion
microSDXC up to 512 GB	microSDXC up to 32 GB
OS
Android (11, 10, 9.0 Pie), Samsung One UI	Android (10)

Battery

Capacity
3100 mAh	3000 mAh
Type
Li - Polymer
Charging
Samsung Adaptive Fast Charging

Camera

Rear
Dual camera	Dual camera
Main camera
16 MP (PDAF) Aperture size: F1.7 Focal length: 27 mm Sensor size: 1/2.8" Pixel size: 1.12 μm	13 MP (PDAF) Aperture size: F1.8 Sensor size: 1/3" Pixel size: 1.12 μm
Second camera
5 MP (Ultra-wide) Aperture size: F2.2 Focal Length: 13 mm Sensor size: 1/5" Pixel size: 1.12 μm	5 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/5" Pixel size: 1.12 μm
Flash
LED	LED
Video recording
1920x1080 (Full HD) (30 fps) Hyperlapse, Video calling, Video sharing	1920x1080 (Full HD) (30 fps)
Front
25 MP, Video capture: 1920x1080 (Full HD)	5 MP, Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
5.0	5.0
WLAN
802.11 a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot	802.11 b,g,n Wi-Fi Direct, Hotspot
USB
Type-C, USB 2.0	microUSB, USB 2.0
Hearing aid compatible
	M3/T3
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers)	Accelerometer
Other
NFC, ANT+, VoIP, Tethering, Computer sync, OTA sync	UMA (Wi-Fi Calling)

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	FM
Additional microphone(s)
Noise cancellation	Noise cancellation

Cellular

4G (FDD)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD)	Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 25(1900+), 26(850+), 66(AWS-3), 71(600)
4G (TDD)
Bands 38(2600), 40(2300), 41(2600+)	Bands 41(2600+)
3G
Bands 1(2100), 2(1900), 5(850), 8(900)	Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed
LTE-A Cat 12/13 (600/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s	LTE-A Cat 7 (300/100 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM
Yes
SIM type
Nano SIM	Nano SIM
HD Voice
	Yes

Regulatory Approval

FCC approval
Date approved: Mar 08, 2019 FCC ID value: A3LSMA405FN	Date approved: Sep 14, 2020 FCC ID value: ZNFK300AM
Measured SAR
Head: 0.51 W/kg Body: 0.46 W/kg Simultaneous Transmission: 1.02 W/kg Wireless Router: 0.61 W/kg	Head: 0.47 W/kg Body: 0.91 W/kg Simultaneous Transmission: 1.26 W/kg Wireless Router: 1.02 W/kg

Buyers information

MSRP
	$ 150
In The Box
	Travel Adapter, USB Cable

Availability

Officially announced
Apr 10, 2019

Links

Full specifications
Samsung Galaxy A40 Specs	LG K31 Specs
User Reviews
Samsung Galaxy A40 User Reviews