Updated : May 17, 2021, 1:46 AM

LG K40

Full Specifications

Released · March 2019

This device is also known as LG LM-X420

4.0

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Popular Comparisons

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Design
Dimensions	6.02 x 2.83 x 0.33 inches 153.0 x 71.9 x 8.3 mm
Weight	5.11 oz (145.0 g)
Materials	Back: Plastic
Resistance	Shock; MIL-STD-810 certified
Biometrics	Fingerprint (touch)
Keys	Left: Volume control; Right: Lock/Unlock key
Colors	Black, Gray, Blue

Display
Size	5.7-inch
Resolution	1440x720px, 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 (14 nm)
Processor	Octa-core 2000 MHz ARM Cortex-A53
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)
This device has different variants: View all

Battery
Capacity	3000 mAh
Type	Li - Polymer

Camera
Rear	Single camera
Main camera	8 MP (PDAF) Aperture size: F2.0 Sensor size: 1/3" Pixel size: 1 μm
Flash	LED
Video recording	1920x1080 (Full HD) (30 fps) Video calling, Video sharing
Front	5 MP (Flash)
This device has different variants: View all

Connectivity & Features
Bluetooth	5.0
Wi-Fi	802.11 a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot
USB	microUSB, USB 2.0
Hearing aid compatible	M3/T3
Location	GPS, A-GPS, Glonass, Cell ID, Wi-Fi positioning
Sensors	Accelerometer, Compass
Other	NFC, VoIP, Tethering, Computer sync, OTA sync

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

Cellular
4G (FDD)	Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 66(AWS-3)
3G	Bands 5(850), 8(900), 2(1900), 1(2100)
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
This device has different variants: View all

Buyers information
MSRP	$ 180

Availability
Officially announced	Feb 20, 2019

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Alternative variants

International version

Differences from the main variant:
System chip	MediaTek Helio P22 MT6762 (12 nm)
Processor	Octa-core 2000 MHz ARM Cortex-A53
GPU	IMG PowerVR GE8320
Internal storage	32GB, available to use: 20.2 GB
Main camera	16 MP
Front	8 MP
4G (FDD)	Bands 1(2100), 3(1800), 7(2600), 8(900), 20(800 DD)
4G (TDD)	Bands 38(2600)
Dual SIM	Yes

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
4G (FDD)	Bands 2(1900), 4(AWS-1), 5(850), 7(2600), 12(700 a), 25(1900+), 26(850+), 66(AWS-3), 71(600)
4G (TDD)	Bands 41(2600+)
FCC approval	Date approved: May 28, 2019 FCC ID value: ZNFX420MM
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

Carrier Availability

Discontinued

AT&T
T-Mobile
U.S. Cellular
Metro by T-Mobile

News

T-Mobile picked up not one and not two but three new budget-friendly Android devices with respectable specs and modern designs last week, but just in case the LG Stylo 6, K51, and Moto G Stylus didn't feel affordable enough, the "Un-carrier" is now a...

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

Starting today, September 27, T-Mobile is selling two new LG smartphones, both made for customers on a budget: LG Aristo 4+ and LG K40. The two handsets run Android 9 Pie out of the box and offer pretty basic features. They are among the cheapest sma...

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

This coming Friday, T-Mobile will start selling the mid-range Samsung Galaxy A10e and Galaxy A20. With a new postpaid phone line, the Galaxy A10e will be free. Otherwise, it has a retail price of $175 or it can be paid off with 24 monthly payments of...

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

After releasing the high-end G8 ThinQ and V50 ThinQ, plus the mid-range Stylo 5, LG this week launched a fourth 2019 smartphone in the US. This time, however, we're talking about a lower end model - the LG K40. Officially announced back in February, ...

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

Overall User Rating

(1 review)

Build quality

Camera quality

Performance

Display

Battery life and charging

Carlos_esp

Arena Apprentice

Worst Phone I ever had

Posted: May 04, 2020, 6:12 PM

Phone owned for less than a year

I broke my previous phone, so the carrier gave me an LG K40. Well, actually, they gave me three LG K40 and two K40s. I guess they didn't sell may of them. Definitely, I can state this is the worst phone I've ever had. My previous one was a Xiaomi Mi 8 and I also had a Lumia 950, and several HTC. So, this phone is temporary. It's always freezing and goes so slowly, and probably it's because the bad IU. The camera isn't good, maybe is not all that bad, but I always used to good cameras. The selfie camera has flash, no complaints about that, but it doesn't takes good selfies. The pro is the battery, better than my previous phone, it lasts a day easily, sometimes even two.