Samsung Galaxy A40 vs LG K31

Compare phone and tablet specifications of up to three devices at once.

Display

Size:

5.9 inches
5.7 inches

Resolution:

2340 x 1080 pixels, 19.5:9 ratio, 437 PPI
1520 x 720 pixels, 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
MediaTek Helio P22 MT6762

Processor:

Octa-core, 1800 MHz, ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2000 MHz, Arm Cortex-A53, 64-bit, 12 nm

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

Device type:

Smartphone
Smartphone

OS:

Android (10, 9.0 Pie), Samsung One UI
Android (10)

Battery

Capacity:

3100 mAh
3000 mAh

Type:

Li - Polymer, Not user replaceable
Not user replaceable

Charging:

Samsung Adaptive Fast Charging

Camera

Rear:

Dual camera
Dual camera

Main camera:

16 MP (PDAF)
13 MP (PDAF)

Specifications:

Aperture size: F1.7; Focal length: 27 mm; Sensor size: 1/2.8"; Pixel size: 1.12 μm
Aperture size: F1.8; Sensor size: 1/3"; Pixel size: 1.12 μm

Second camera:

5 MP (Ultra-wide)
5 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Focal Length: 13 mm; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm

Video recording:

1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD) (30 fps)

Features:

Hyperlapse, Video calling, Video sharing

Front:

25 MP
5 MP

Video capture:

1920x1080 (Full HD)
1920x1080 (Full HD)

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

Cellular

LTE (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)

LTE (TDD):

Bands 38(2600), 40(2300), 41(2600+)
Bands 41(2600+)

UMTS:

Bands 5(850), 8(900), 2(1900), 1(2100)
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)

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

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):

for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

5.0
5.0

Wi-Fi:

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 (reversible), USB 2.0
microUSB, USB 2.0

Features:

Charging, Mass storage device
Charging

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)

Hearing aid compatible:

M3, T3

Regulatory Approval

FCC approval:

Date approved:

Mar 08, 2019

FCC ID value:

A3LSMA405FN link

Measured SAR:

Head:

0.51 W/kg

Body:

0.46 W/kg

Simultaneous Transmission:

1.02 W/kg

Wireless Router:

0.61 W/kg

Buyers information

Price:

$ 150

User Manual:

This is the official LG K31 User Guide in English provided from the manufacturer.

In The Box:

Travel Adapter, USB Cable

Availability

Officially announced:

Apr 10, 2019
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