LG Stylo 2 Plus (K557) vs LG K40 (X420EMW)

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Side by side comparison between LG Stylo 2 Plus vs LG K40 phones, differences, pros, cons and full specifications. What's the better?

4/4/2019 9:46 PM, updated: 5/18/2020 2:48 PM

Compare LG K40 X LG Stylo 2 Plus (K557) 08Points

Specifications Compare Models Pictures

5.7"
IPS

1080x1920

13
MP

5mp

2GB
RAM

Octa-core

3000
mAh

(Removable)

13Points LG K40 (X420EMW) Compare LG Stylo 2 Plus X

Specifications Compare Models Pictures

5.7"
IPS

720x1440

16
MP

8mp

2GB
RAM

Octa-core

3000
mAh

(Non removable)

What's the better phone? LG K40 (X420EMW)

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!

8 Advantages LG Stylo 2 Plus (K557)	vs	13 Advantages LG K40 (X420EMW)
+143 grams (5.01 ounces)1% Lighter	vs	145 grams (5.08 ounces)
+7.4 millimeters (0.29 inches)12% Thinner	vs	8.3 millimeters (0.33 inches)
+1080x1920 pixels100% Higher resolution screen	vs	720x1440 pixels
+386 PPI37% Crisper display of text, images and videos because it has more pixels per inch (ppi)	vs	282 PPI
+CompassAdvantage Sensors help you use the device	vs	Not supported
+Li-Ion: lithium-ion (Removable)Advantage Removable battery can be replaced easily	vs	Li-Ion: lithium-ion (Non removable)
+FM (RDS)Advantage The radio lets you listen to your songs and sports in general	vs	Not supported
+Gorilla Glass 3Advantage Protection against scratches on the screen lets you carry your phone with your keys	vs	Not supported
1.4GHz 64bit Octa-core	vs	+2GHz 64bit Octa-core (12nm)47% More powerful processor, you can open your applications faster
16GB (9GB available)	vs	+32GB (20GB available)122% More internal storage for applications and files
Until 256GB microSD, microSDXC	vs	+Until 1TB microSD, microSDXC3 times More external storage for files using memory cards
(back) 13MP	vs	+(back) 16MP23% Higher resolution main camera
LED flash	vs	+LED flash on both camerasAdvantage The LED flash on both cameras helps in dark places or in low light
HDR photo only main camera	vs	+HDR photo on both camerasAdvantage The HDR technology produced photos with more detail in dark areas
f/2.2 (aperture)	vs	+f/2.0 (aperture)10% Diaphragm opening (Aperture) of the camera which has the smallest F number takes photos with better light exposure.
(front) 5MP	vs	+(front) 8MP63% Higher resolution secondary camera to take pictures and selfies
Android 7.0 Nougat	vs	+Android 8.1 OreoAdvantage Android 8.1 Oreo is newer and safer
(4G LTE) 150 Mbps	vs	+(4G LTE-A) 300 Mbps100% Faster for surfing the internet and download files
1 slot (Single-SIM) (dedicated slot)	vs	+2 slots (Dual-SIM) (dedicated slot)Advantage You can have more mobile carriers/operators on the same device.
4.2 + A2DP	vs	+5.0 + A2DP/LEAdvantage Bluetooth 5.0 + A2DP/LE is newer and faster
Not supported	vs	+MIL-STD-810G military certifiedAdvantage Protection against water allows you talk to your friends in the rain, for example

28 Common items in both devices

2GB LPDDR3

TFT IPS LCD

16 million

5.7"

Only digital zoom

Autofocus / PDAF: phase detection autofocus

EIS: Digital stabilization

+21 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 Stylo 2 Plus (K557)	LG K40 (X420EMW)
Change model		Choose the model
Model	Stylo 2 Plus (K557)	K40 (X420EMW)
Other model names	LG Stylus 2 Plus 16GB, LG-K557, LGK557, LG PH2	LG K40 LMX420EMW NFC Dual-sim, LM-X420EMW, LG-LMX420EMW
Country or region available	Canada	(Global, International), (Europe)
Brand	LG	LG
Release date	6/27/2016	3/31/2019
Depth	7.4 millimeters (0.29 inches)	8.3 millimeters (0.33 inches)
Size (width x height)	79.6 x 155 millimeters (3.13 x 6.1 in)	71.9 x 153 millimeters (2.83 x 6.02 in)
Weight	143 grams (5.01 ounces)	145 grams (5.08 ounces)
Build, materials	feature not registered	Plastic body, glass front
Protection against water and others	Not supported	MIL-STD-810G military certified: salt, dust, humidity, rain, vibration, solar radiation, transport and thermal shock resistant.
📲 Display
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
Display type	TFT IPS LCD	TFT IPS LCD
Screen size	5.7" inches	5.7" inches
Screen-to-body ratio	~72.6% (screen-to-body ratio)	~76.2% (screen-to-body ratio)
Display resolution	1080x1920 pixels	720x1440 pixels
Touchscreen	Capacitive Multitouch	Capacitive Multitouch
Pixel density (dot pitch)	386 PPI	282 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass 3	Not supported
Refresh rate	feature not registered	feature not registered
Display features	feature not registered	feature not registered
🤖 Operating System
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
System version	Android 6.0.1 Marshmallow	Android 8.1 Oreo
Firmware update	Android 7.0 Nougat	feature not registered
User Interface	feature not registered	feature not registered
⚙️ Processor
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
Chipset	64bit: Qualcomm Snapdragon 430 MSM8937 (28nm)	64bit: MediaTek Helio P22 (MT6762) (12nm)
CPU	Octa-core, 2 processors: 4x 1.4GHz ARM Cortex-A53 (Quad-core) 4x 1.1GHz ARM Cortex-A53 (Quad-core)	Octa-core, 2 processors: 4x 2GHz ARM Cortex-A53 (Quad-core) 4x 1.5GHz ARM Cortex-A53 (Quad-core)
GPU graphical controller	Qualcomm Adreno 505 450Mhz	PowerVR GE8320 (650MHz)
Performance (benchmark)	feature not registered	feature not registered
💽 Memory and storage
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
RAM memory	2GB LPDDR3	2GB LPDDR3
Internal storage	16GB (9GB available)	32GB (20GB available) eMMC 5.1
External storage	Until 256GB microSD, microSDXC (dedicated slot)	Until 1TB microSD, microSDXC (dedicated slot)
📶 Mobile networks
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
Dual-SIM	Not supported	Dual-SIM Standby - Call active on one sim card (dedicated slot)
SIM card	1 slot (Single-SIM) nano-SIM (4FF)	2 slots (Dual-SIM) nano-SIM (4FF)
Maximum Download / Upload	150/50 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	GSM 850/900/1800/1900
Primary 3G network	UMTS 850/1700/1900/2100	UMTS 850/900/1900/2100
Primary 4G network	LTE Cat4 700/800/850/1700/1800/1900/2100/2600 (Bands 1,2,3,4,5,7,12,17,20)	LTE Cat6 (Bands 1, 3, 5, 7, 8, 20) TD-LTE (Bands 38)
Primary 5G network	Not supported	Not supported
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE	GPRS, EDGE, UMTS, 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 Stylo 2 Plus (K557)	LG K40 (X420EMW)
Back camera (main camera)	13 megapixels	16 megapixels
Main camera resolution	4160x3120 pixels	4608x3456 pixels
Video recording (primary)	Full HD (1920x1080) 30 fps	Full HD (1920x1080) 30 fps
Flash	LED flash	LED flash on both cameras
Focal aperture	f/2.2 (aperture)	f/2.0 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	1/3" inches
Pixel size	feature not registered	1µm pixel
Autofocus	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 only main camera	HDR photo on both cameras
Camera extras	feature not registered	feature not registered
📸 Front camera
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
Front camera (secondary)	5 megapixels	8 megapixels
Front camera resolution	2560x1920 pixels	3264x2448 pixels
Video recording (secondary)	Full HD (1920x1080)	Full HD (1920x1080)
Front flash	Not supported	LED
Focal aperture	feature not registered	f/2.0 (aperture)
Focal length	feature not registered	feature not registered
Sensor size	feature not registered	feature not registered
Pixel size	feature not registered	feature not registered
🔉 Sound and multimedia
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
Loudspeaker	Supported	Supported
Active noise cancellation	2 microphones or more	2 microphones or more
Radio	FM (RDS)	Not supported
TV	Not supported	Not supported
Video formats	MP4, H.264, H.263, DivX, MKV	MP4, H.264, H.263, XviD, MKV
Audio formats	MP3, WAV, WMA, eAAC+, FLAC	MP3, WAV, WMA, eAAC+, FLAC
🔌 Connectivity
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
USB	MicroUSB 2.0	MicroUSB 2.0, USB OTG On-The-Go
Audio output	3.5mm jack	3.5mm jack
TV output	Not supported	Not supported
Bluetooth	4.2 + A2DP	5.0 + A2DP/LE
WiFi	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) WiFi Direct, hotspot	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Supported	Supported
GPS	A-GPS, GeoTagging, GLONASS	A-GPS, GeoTagging
NFC	Supported	Supported
Infrared port	Not supported	Not supported
🧭 Sensors
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
Sensors	Accelerometer Ambient light sensor Compass Fingerprint sensor Hall effect Proximity sensor	Accelerometer Ambient light sensor Fingerprint sensor (rear-mounted) Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
Battery type	Li-Ion: lithium-ion (Removable)	Li-Ion: lithium-ion (Non removable)
Battery capacity	3000 mAh	3000 mAh
Charger, watts	Wired charging	Wired charging
Inductive / wireless charging	feature not registered	feature not registered
Talk time autonomy	20 hours	8 hours
Standby	460 hours (19.2 days)	100 hours (4.2 days)
➕ Other features
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
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: Titan, Gold, Brown • LG UI 5.0 • LED notification • Stylus Pen (Pen Pop) • KnockON, Knock Code • QSlide, QuickMemo+ • HD Voice	• Colors: Black, Moroccan Blue, Platinum Gray • 18:9 ratio FullVision display • LED notification • DTS-X Surround sound
☢️ Radiation rate
	LG Stylo 2 Plus (K557)	LG K40 (X420EMW)
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