LG K40 vs LG K31 vs LG K30

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

Display

Size:

5.7 inches
5.7 inches
5.3 inches

Resolution:

1440 x 720 pixels, 18:9 ratio, 282 PPI
1520 x 720 pixels, 19:9 ratio, 295 PPI
1280 x 720 pixels, 277 PPI

Technology:

IPS LCD
IPS LCD
TFT

Screen-to-body:

76.28 %
77.13 %
69.55 %

Features:

Scratch-resistant glass (Tempered Glass), Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor

Hardware

System chip:

Qualcomm Snapdragon 450 SDM450
MediaTek Helio P22 MT6762
Qualcomm Snapdragon 425 MSM8917

Processor:

Octa-core, 2000 MHz, ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2000 MHz, Arm Cortex-A53, 64-bit, 12 nm
Quad-core, 1400 MHz, ARM Cortex-A53, 64-bit, 28 nm

GPU:

Adreno 506
IMG PowerVR GE8320
Adreno 308

RAM:

2GB LPDDR3
2GB
2GB LPDDR3

Internal storage:

16GB, available to use: 8 GB
32GB, available to use: 17 GB
16GB

Storage expansion:

microSDXC up to 2000 GB
microSDXC up to 32 GB
microSDXC up to 2000 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (8.1 Oreo)
Android (10)
Android (7.1 Nougat)

Battery

Capacity:

3000 mAh
3000 mAh
3000 mAh

Type:

Li - Polymer, Not user replaceable
Not user replaceable
Li - Ion, Not user replaceable

Charging:

Fast charging

Camera

Rear:

Single camera
Dual camera
Single camera

Main camera:

8 MP (PDAF)
13 MP (PDAF)
8 MP (PDAF)

Specifications:

Aperture size: F2.0; Sensor size: 1/3"; Pixel size: 1 μm
Aperture size: F1.8; Sensor size: 1/3"; Pixel size: 1.12 μm
Aperture size: F2.2

Second camera:

5 MP (Ultra-wide)

Specifications:

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)
1920x1080 (Full HD) (30 fps)

Features:

Video calling, Video sharing
Picture-taking during video recording, Video calling, Video sharing

Front:

5 MP (Flash)
5 MP
5 MP

Video capture:

1920x1080 (Full HD)

Design

Dimensions:

6.02 x 2.83 x 0.33 inches (153.0 x 71.9 x 8.3 mm)
5.82 x 2.8 x 0.34 inches (147.8 x 71.1 x 8.6 mm)
5.85 x 2.95 x 0.34 inches (148.6 x 74.9 x 8.6 mm)

Weight:

5.11 oz (145.0 g)
5.15 oz (146.0 g)
5.93 oz (168.0 g)

Materials:

Back: Plastic
Back: Plastic; Frame: Plastic
Frame: Metal

Resistance:

Shock; MIL-STD-810 certified
Yes; MIL-STD-810 certified

Biometrics:

Fingerprint (touch)
Fingerprint (touch)
Fingerprint (touch)

Keys:

Left: Volume control; Right: Lock/Unlock key
Left: Volume control; Right: Lock/Unlock key
Left: Volume control; Back: Lock/Unlock key

Colors:

Black, Gray, Blue
Silver
Black

Cellular

LTE (FDD):

Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 66(AWS-3)
Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 25(1900+), 26(850+), 66(AWS-3), 71(600)
Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 66(AWS-3)

LTE (TDD):

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

Data Speed:

LTE-A Cat 6 (300/50 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
LTE Cat 4 (150/50 Mbit/s), HSPA, HSUPA, UMTS

SIM type:

Nano SIM
Nano SIM
Nano SIM

HD Voice:

Yes
Yes
Yes

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Loudspeaker
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

Album art cover, Background playback
Album art cover, Background playback

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM
FM
FM

Additional microphone(s):

for Noise cancellation
for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

5.0
5.0
4.2

Wi-Fi:

802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
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
microUSB, USB 2.0
microUSB, USB 2.0

Features:

Charging, OTG, Mass storage device
Charging
Mass storage device, OTG, Charging

Location:

GPS, A-GPS, Glonass, Cell ID, Wi-Fi positioning
GPS, A-GPS, Cell ID, Wi-Fi positioning
GPS, A-GPS

Sensors:

Accelerometer, Compass
Accelerometer
Accelerometer

Other:

NFC, VoIP, Tethering, Computer sync, OTA sync
UMA (Wi-Fi Calling)
NFC, UMA (Wi-Fi Calling), VoIP, Tethering, Computer sync, OTA sync

Hearing aid compatible:

M3, T3
M3, T3
M3, T3

Buyers information

Price:

$ 180
$ 150
$ 180

User Manual:

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

In The Box:

Travel Adapter, USB Cable
SIM removal tool, microUSB Cable, Wall Charging Adapter, Start Guide

Availability

Officially announced:

Feb 20, 2019
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