LG K40 (X420ZM) vs Xiaomi Mi 8 Youth (128GB/6GB)

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Side by side comparison between LG K40 vs Xiaomi Mi 8 Youth phones, differences, pros, cons and full specifications. What's the better?

4/4/2019 9:22 PM, updated: 3/16/2020 6:59 PM

Compare Xiaomi Mi 8 Youth X LG K40 (X420ZM) 06Points

Specifications Compare Models Pictures

5.7"
IPS

720x1440

16
MP

8mp

2GB
RAM

Octa-core

3000
mAh

(Non removable)

19Points Xiaomi Mi 8 Youth (128GB/6GB) Compare LG K40 X

Specifications Compare Models Pictures

6.26"
IPS

1080x2280

12
MP

24mp

6GB
RAM

Octa-core

3350
mAh

(Non removable)

What's the better phone? Xiaomi Mi 8 Youth (128GB/6GB)

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!

6 Advantages LG K40 (X420ZM)	vs	19 Advantages Xiaomi Mi 8 Youth (128GB/6GB)
+Until 1TB microSD, microSDXCAdvantage More external storage for files using memory cards	vs	Not supported
+150 grams (5.25 ounces)13% Lighter	vs	169 grams (5.92 ounces)
+LED flash on both camerasAdvantage The LED flash on both cameras helps in dark places or in low light	vs	LED flash
+3.5mm jackAdvantage Headsets with 3.5mm Jack size are more common and easy to find in stores	vs	Type-C jack with 3.5mm jack adapter
+FMAdvantage The radio lets you listen to your songs and sports in general	vs	Not supported
+MIL-STD-810G military certifiedAdvantage Protection against water allows you talk to your friends in the rain, for example	vs	Not supported
2GHz 64bit Octa-core (12nm)	vs	+2.2GHz 64bit Octa-core9% More powerful processor, you can open your applications faster
2GB LPDDR3	vs	+6GB LPDDR4X2 times More RAM memory. Typically more responsive and better for multitasking.
32GB (20GB available)	vs	+128GB (110GB available)5 times More internal storage for applications and files
8.3 millimeters (0.33 inches)	vs	+7.5 millimeters (0.3 inches)11% Thinner
Plastic body, glass front	vs	+Aluminum frame, glass front/backAdvantage More resistant material
720x1440 pixels	vs	+1080x2280 pixels138% Higher resolution screen
282 PPI	vs	+403 PPI43% Crisper display of text, images and videos because it has more pixels per inch (ppi)
5.7"	vs	+6.26"10% Larger screen
(back) 16MP	vs	+(dual camera) 12MP + 5MP7% Higher resolution main camera
1/3" inches	vs	+1/2.55" inches18% The larger sensor camera lets you take photos with better depth.
f/2.0 (aperture)	vs	+f/1.9 (aperture)5% Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
(front) 8MP	vs	+(front) 24MP198% Higher resolution secondary camera to take pictures and selfies
Full HD (1920x1080)	vs	+4K UHD (3840x2160)3 times More image quality for recording videos with the primary camera
Android 8.1 Oreo	vs	+Android 9.0 PieAdvantage Android 9.0 Pie is newer and safer
Not supported	vs	+CompassAdvantage Sensors help you use the device
Not supported	vs	+GyroscopeAdvantage Sensors help you use the device
3000 mAh	vs	+3350 mAh12% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use
1 slot (Single-SIM) (dedicated slot)	vs	+2 slots (Dual-SIM)Advantage You can have more mobile carriers/operators on the same device.
MicroUSB 2.0, USB OTG On-The-Go	vs	+Type-CAdvantage Reversible connector, you can stick in a USB-C cable any which way; either side is up.

26 Common items in both devices

eMMC 5.1

TFT IPS LCD

16 million

Only digital zoom

PDAF: phase detection autofocus

EIS: Digital stabilization

HDR photo on both cameras

+19 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differences

📱 Model features
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
Change model		Choose the model
Model	K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
Other model names	LG K40 LMX420ZM, LM-X420ZM, LG-LMX420ZM	小米8 青春版 M1808D2TT, Xiaomi Mi8, Xiaomi Mi 8X, Xiaomi Platina
Country or region available	South Africa	China
Brand	LG	Xiaomi
Release date	3/31/2019	9/1/2018
Depth	8.3 millimeters (0.33 inches)	7.5 millimeters (0.3 inches)
Size (width x height)	71.9 x 153 millimeters (2.83 x 6.02 in)	75.8 x 156.4 millimeters (2.98 x 6.16 in)
Weight	150 grams (5.25 ounces)	169 grams (5.92 ounces)
Build, materials	Plastic body, glass front	Aluminum frame, glass front/back
Protection against water and others	MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.	Not supported
📲 Display
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
Display type	TFT IPS LCD	TFT IPS LCD
Screen size	5.7" inches	6.26" inches
Screen-to-body ratio	~76.2% (screen-to-body ratio)	~82.5% (screen-to-body ratio)
Display resolution	720x1440 pixels	1080x2280 pixels
Touchscreen	Capacitive Multitouch	Capacitive Multitouch
Pixel density (dot pitch)	282 PPI	403 PPI
Colors	16 million	16 million
Scratch-resistant glass	Not supported	Not supported
Refresh rate	feature not registered	feature not registered
Display features	feature not registered	feature not registered
🤖 Operating System
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
System version	Android 8.1 Oreo	Android 8.1 Oreo
Firmware update	feature not registered	Android 9.0 Pie
User Interface	feature not registered	feature not registered
⚙️ Processor
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
Chipset	64bit: MediaTek Helio P22 (MT6762) (12nm)	64bit: Qualcomm Snapdragon 660 SDM660 (14nm)
CPU	Octa-core, 2 processors: 4x 2GHz ARM Cortex-A53 (Quad-core) 4x 1.5GHz ARM Cortex-A53 (Quad-core)	Octa-core, 2 processors: 4x 2.2GHz Kryo 260 Gold (Quad-core) 4x 1.8GHz Kryo 260 Silver (Quad-core)
GPU graphical controller	PowerVR GE8320 (650MHz)	Qualcomm Adreno 512 650Mhz
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
RAM memory	2GB LPDDR3	6GB LPDDR4X
Internal storage	32GB (20GB available) eMMC 5.1	128GB (110GB available) eMMC 5.1
External storage	Until 1TB microSD, microSDXC (dedicated slot)	Not supported
📶 Mobile networks
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
Dual-SIM	Not supported	Dual-SIM Standby - Call active on one sim card
SIM card	1 slot (Single-SIM) nano-SIM (4FF)	2 slots (Dual-SIM) nano-SIM (4FF)
Maximum Download / Upload	300/50 Mbps	300/50 Mbps
Network technology	2G, 3G, 4G	2G, 3G, 4G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Quad-Band 850/900/1800/1900	Quad-Band 850/900/1800/1900
Primary 2G network	GSM 850/900/1800/1900	CDMA 800, GSM 850/900/1800/1900
Primary 3G network	UMTS 850/900/1900/2100	CDMA2000 1xEV-DO TD-SCDMA 1900/2000 UMTS 850/900/1900/2100
Primary 4G network	LTE Cat6 (Bands 1, 3, 5, 7, 8, 20) TD-LTE (Bands 38, 40)	LTE Cat6 (Bands 1,3,5,7,8) TD-LTE (Bands 34,38,39,40,41) VoLTE
Primary 5G network	Not supported	Not supported
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A	GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
Secondary 2G network	Not supported	GSM 850/900/1800/1900
Secondary 3G network	Not supported	Not supported
Secondary 4G network	Not supported	Not supported
Secondary data network	Not supported	GPRS, EDGE
📷 Camera
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
Back camera (main camera)	16 megapixels	(dual camera) 12 megapixels 5MP depth f/2.01.12µm
Main camera resolution	4608x3456 pixels	4000x3000 pixels
Video recording (primary)	Full HD (1920x1080) 30 fps	4K UHD (3840x2160) 30 fps
Flash	LED flash on both cameras	LED flash
Focal aperture	f/2.0 (aperture)	f/1.9 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	1/3" inches	1/2.55" inches
Pixel size	1µm pixel	1.4µm pixel
Autofocus	PDAF: phase detection autofocus	PDAF: phase detection autofocus
Touch focus	Supported	Supported
Image stabilization	EIS: Digital stabilization	EIS: Digital stabilization
Zoom	Only digital zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Not supported	Not supported
HDR	HDR photo on both cameras	HDR photo on both cameras
Camera extras	feature not registered	feature not registered
📸 Front camera
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
Front camera (secondary)	8 megapixels	24 megapixels
Front camera resolution	3264x2448 pixels	5632x4224 pixels
Video recording (secondary)	Full HD (1920x1080)	Full HD (1920x1080)
Front flash	LED	Not supported
Focal aperture	f/2.0 (aperture)	feature not registered
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	feature not registered	1.8µm pixel
🔉 Sound and multimedia
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
Loudspeaker	Supported	Supported
Active noise cancellation	2 microphones or more	2 microphones or more
Radio	FM	Not supported
TV	Not supported	Not supported
Video formats	MP4, H.264, H.263, XviD, MKV	MP4, H.265, H.264, H.263, DivX, XviD, WMV
Audio formats	MP3, WAV, WMA, eAAC+, FLAC	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
USB	MicroUSB 2.0, USB OTG On-The-Go	USB 2.0 Type-C, USB OTG On-The-Go
Audio output	3.5mm jack	Type-C jack with 3.5mm jack adapter
TV output	Not supported	Not supported
Bluetooth	5.0 + A2DP/LE	5.0 + A2DP/LE
WiFi	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Not supported	Not supported
GPS	A-GPS, GeoTagging	A-GPS, GeoTagging, GLONASS, BeiDou
NFC	Not supported	Not supported
Infrared port	Not supported	Not supported
🧭 Sensors
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
Sensors	Accelerometer Ambient light sensor Fingerprint sensor (rear-mounted) Proximity sensor	Accelerometer Ambient light sensor Compass Fingerprint sensor (rear-mounted) Gyroscope Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
Battery type	Li-Ion: lithium-ion (Non removable)	LiPo: li-ion polymer (Non removable)
Battery capacity	3000 mAh	3350 mAh
Charger, watts	Wired charging	10W (5V/2A) Wired charging
Inductive / wireless charging	feature not registered	feature not registered
Talk time autonomy	8 hours	feature not registered
Standby	100 hours (4.2 days)	feature not registered
➕ Other features
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
Call control	Voice dialing, Voice recorder	Voice dialing, Voice recorder
Messaging	SMS (T9), MMS, E-mail, Push mail	SMS (T9), MMS, E-mail, Push mail
Hands-free calling	Supported	Supported
Video calling	Supported	Supported
Ringtones	Polyphonic and customized	Polyphonic and customized
Web browser	HTML, XHTML, HTML5	HTML, XHTML, HTML5
Antenna	Internal antenna	Internal antenna
Qwerty physical keyboard	Not supported	Not supported
Miscellaneous	• Colors: Black, Moroccan Blue, Platinum Gray • 18:9 ratio FullVision display • LED notification • DTS-X Surround sound	• Colors: Twilight gold, Dream blue, Deep space gray • MIUI • 19:9 screen • Quick Charge 3.0
☢️ Radiation rate
	LG K40 (X420ZM)	Xiaomi Mi 8 Youth (128GB/6GB)
SAR 1.6W/kg (USA, Mexico, etc.)	feature not registered	feature not registered
SAR 2W/kg (Europe, UK, etc.)	feature not registered	feature not registered

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LG K40 (X420ZM) vs Xiaomi Mi 8 Youth (128GB/6GB)

Side by side comparison between LG K40 vs Xiaomi Mi 8 Youth phones, differences, pros, cons and full specifications. What's the better?

What's the better phone? Xiaomi Mi 8 Youth (128GB/6GB)

📱 Model features

📲 Display

🤖 Operating System

⚙️ Processor

💽 Memory and storage

📶 Mobile networks

📷 Camera

📸 Front camera

🔉 Sound and multimedia

🔌 Connectivity

🧭 Sensors

🔋 Battery

➕ Other features

☢️ Radiation rate