LG K40

4.0

User Score

Released

March 2019

Display

5.7 inches
1440 x 720 pixels

Camera

8 MP (Single camera)
5 MP front

Hardware

Qualcomm Snapdragon 450
2GB RAM

Storage

16GB, microSDXC

Battery

3000 mAh

OS

Android 8.1 Oreo

Description

The LG K40 specifications include a 5.7-inch display with 720 x 1440 pixels resolution, an octa-core processor, 2 GB RAM, and 16-megapixel main camera. The phone is powered by 3000 mAh battery.

This device is also known as LG LM-X420

Shop links

$201

$90

News

It's raining free mid-range phone deals at T-Mobile, no trade-in needed

T-Mobile launches the LG Aristo 4+ and LG K40, two of its cheapest 2019 smartphones

Switch to Metro, bring your number, and score a free Samsung Galaxy A20

Affordable LG K40 now available in the US (works on T-Mobile, Verizon, AT&T)

Popular Comparisons

The LG K40 is most commonly compared with these phones:

Specs Compare

Display
Size:	5.7 inches
Resolution:	1440 x 720 pixels, 18:9 ratio, 282 PPI
Technology:	IPS LCD
Screen-to-body:	76.28 %
Features:	Scratch-resistant glass (Tempered Glass), Ambient light sensor, Proximity sensor

Hardware
System chip:	Qualcomm Snapdragon 450 SDM450
Processor:	Octa-core, 2000 MHz, ARM Cortex-A53, 64-bit, 14 nm
GPU:	Adreno 506
RAM:	2GB LPDDR3
Internal storage:	16GB, available to use: 8 GB
Storage expansion:	microSDXC up to 2000 GB
OS:	Android (8.1 Oreo)

Battery
Capacity:	3000 mAh
Type:	Li - Polymer, Not user replaceable

Camera
Rear:	Single camera
Main camera:	8 MP (PDAF)
Specifications:	Aperture size: F2.0; Sensor size: 1/3"; Pixel size: 1 μm
Video recording:	1920x1080 (Full HD) (30 fps)
Features:	Video calling, Video sharing
Front:	5 MP (Flash)

Design Size comparison
Dimensions:	6.02 x 2.83 x 0.33 inches (153.0 x 71.9 x 8.3 mm)
Weight:	145.0 g
Materials:	Back: Plastic
Resistance:	Shock; MIL-STD-810 certified
Biometrics:	Fingerprint (touch)
Colors:	Black, Gray, Blue

Cellular
LTE (FDD):	Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 66(AWS-3)
UMTS:	850, 900, 1900, 2100 MHz
Data Speed:	LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
SIM type:	Nano SIM
HD Voice:	Yes

Multimedia
Headphones:	3.5mm jack
Speakers:	Earpiece, Loudspeaker
Features:	Album art cover, Background playback
Screen mirroring:	Wireless screen share
Radio:	FM
Additional microphone(s):	for Noise cancellation

Connectivity & Features
Bluetooth:	5.0
Wi-Fi:	802.11 a, b, g, n, ac, dual-band; Hotspot, Wi-Fi Direct
USB:	microUSB, USB 2.0
Features:	Mass storage device, OTG, Charging
Location:	GPS, A-GPS, Glonass, Cell ID, Wi-Fi positioning
Sensors:	Accelerometer, Compass
Other:	NFC, VoIP, Tethering, Computer sync, OTA sync

Phone features
Notifications:	Haptic feedback, Music ringtones, Vibration
Other features:	Voice dialing, Voice commands, Voice recording, TTY/TDD

Buyers information
Price:	$ 180

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Alternative variants

LG K40

International version

Differences from the main variant:
System chip:	MediaTek Helio P22 MT6762
Processor:	Octa-core, 2000 MHz, ARM Cortex-A53, 64-bit, 12 nm
GPU:	IMG PowerVR GE8320
Internal storage:	32GB, available to use: 20.2 GB
Main camera:	16 MP
Front:	8 MP
LTE (FDD):	Bands 1(2100), 3(1800), 7(2600), 8(900), 20(800 DD)
LTE (TDD):	Bands 38(2600)
Dual SIM:	Yes

LG K40

for Metro by T-Mobile

Differences from the main variant:
Internal storage:	32GB, available to use: 17.9 GB
OS:	Android (9.0 Pie)
Main camera:	13 MP
Front:	5 MP
LTE (FDD):	Bands 2(1900), 4(AWS-1), 5(850), 7(2600), 12(700 a), 25(1900+), 26(850+), 66(AWS-3), 71(600)
LTE (TDD):	Bands 41(2600+)
FCC approval:
Date approved:	May 28, 2019
FCC ID value:	ZNFX420MM link
Measured SAR:
Head:	0.51 W/kg
Body:	0.98 W/kg
Simultaneous Transmission:	1.59 W/kg
Wireless Router:	0.98 W/kg
Phablet:	3.99 W/kg