LG K40 vs Xiaomi Poco X4 GT Specs Comparison

Display

Size
5.7-inch	6.6-inch
Resolution
1440 x 720 px, 18:9 ratio, 282 PPI	2460 x 1080 px, 20.5:9 ratio, 407 PPI
Technology
IPS LCD	IPS LCD
Refresh rate
	144Hz
Screen-to-body
76.28 %	84.97 %
Features
Scratch-resistant glass (Tempered Glass), Ambient light sensor, Proximity sensor	Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 450 SDM450 (14 nm)	MediaTek Dimensity 8100 SM8250- (5 nm)
Processor
Octa-core, 2000 MHz, ARM Cortex-A53, 64-bit	Octa-core, 4x 2.85GHz Cortex-A78 + 4x 2.0GHz Cortex-A55
GPU
Adreno 506	Mali-G610 MC6
RAM
2GB (LPDDR3)	8GB
Internal storage
16GB, available to use: 8 GB	128GB (UFS 3.1), not expandable
Storage expansion
microSDXC up to 2000 GB
OS
Android (8.1 Oreo)	Android (12), Xiaomi MI UI
Device type
Smartphone	Smartphone

Battery

Capacity
3000 mAh	5080 mAh
Type
Li - Polymer, Not user replaceable	Not user replaceable
Charging
	Qualcomm Quick Charge, USB Power Delivery
Max charge speed
	Wired: 67.0W

Camera

Rear
Single camera	Triple camera
Main camera
8 MP (PDAF) Specifications: Aperture size: F2.0 Sensor size: 1/3" Pixel size: 1 μm	64 MP (PDAF) Specifications: Aperture size: F1.9 Pixel size: 0.8 μm
Second camera
	8 MP (Ultra-wide) Specifications: Aperture size: F2.2 Sensor size: 1/4" Pixel size: 1.12 μm
Third camera
	2 MP (Macro, Autofocus) Specifications: Aperture size: F2.4
Flash
LED	LED
Video recording
1920x1080 (Full HD) (30 fps) Features: Video calling, Video sharing	3840x2160 (4K UHD), 1920x1080 (Full HD), 1280x720 (HD) Features: Time-lapse video, EIS
Front
5 MP (Flash)	16 MP (HDR, Slow-motion videos), 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)	6.44 x 2.93 x 0.35 inches (163.6 x 74.3 x 8.9 mm)
Weight
5.11 oz(145.0 g)	7.05 oz(200.0 g)
Materials
Back: Plastic	Frame: Plastic
Resistance
Shock; MIL-STD-810 certified
Biometrics
Fingerprint (touch)	2D Face unlock, Fingerprint (touch)
Keys
Left: Volume control; Right: Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Black, Gray, Blue	Blue. Black, Silver

Cellular

5G
	Bands n1, n3, n5, n7, n8, n20, n28, n38, n40, n41, n77, n78, SA, NSA
4G (FDD)
Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 66(AWS-3)	Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 17(700 b), 18(800 Lower), 19(800 Upper), 20(800 DD), 26(850+), 28(700 APT)
4G (TDD)
	Bands 38(2600), 40(2300), 41(2600+)
3G
Bands 5(850), 8(900), 2(1900), 1(2100)	Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s	LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
SIM type
Nano SIM	Dual Nano SIM
HD Voice
Yes

Multimedia

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

Connectivity & Features

Bluetooth
5.0	5.3
Wi-Fi
802.11 a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot	802.11 a,b,g,n,ac,ax(Wi-Fi 6),dual-band Wi-Fi Direct, Hotspot
USB
microUSB, USB 2.0, Features: Charging, OTG, Mass storage device	Type-C (reversible), USB 2.0, Features: Charging, Headphones port, OTG
Hearing aid compatible
M3/T3
Location
GPS, A-GPS, Glonass, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, BeiDou, Dual-band positioning, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Compass	Accelerometer, Gyroscope, Compass
Other
NFC, VoIP, Tethering, Computer sync, OTA sync	NFC

Buyers information

MSRP
$ 180

Availability

Officially announced
Feb 20, 2019	Jun 23, 2022

Alternative variants

International version

System chip	MediaTek Helio P22 MT6762 (12 nm)
Processor	Octa-core, 2000 MHz, ARM Cortex-A53, 64-bit
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

With 256GB internal storage

Internal storage	256GB

for Metro by T-Mobile

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

Links

Full specifications
LG K40 Specs	Xiaomi Poco X4 GT Specs
User Reviews
LG K40 User Reviews	Xiaomi Poco X4 GT User Reviews