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Samsung Galaxy J8 vs LG K40 Specs Comparison

Compare mobile phone specifications of up to three devices at once. Our specs comparison tool helps you find and compare the perfect phone for your needs.

Comparison mode:
Specs Size
Differences only
Samsung Galaxy J8
LG K40
Samsung Galaxy J8 LG K40
Released · Jun 28, 2018
Released · March 2019
6.0-inch
5.7-inch
Dual camera
Single camera
4GB · 64GB
2GB · 16GB
3500 mAh
3000 mAh

Design

Dimensions
6.27 x 2.98 x 0.32 inches
159.2 x 75.7 x 8.2 mm 		6.02 x 2.83 x 0.33 inches
153.0 x 71.9 x 8.3 mm
Weight
6.24 oz (177.0 g) 5.11 oz (145.0 g)
Materials
Back: Plastic Back: Plastic
Resistance
Shock; MIL-STD-810 certified
Biometrics
2D Face unlock, Fingerprint (touch) Fingerprint (touch)
Keys
Left: Volume control; Right: Lock/Unlock key Left: Volume control; Right: Lock/Unlock key
Colors
Black, Gold, Pink, Blue Black, Gray, Blue

Display

Size
6.0-inch 5.7-inch
Resolution
1480x720px, 18.5:9 ratio, 274 PPI 1440x720px, 18:9 ratio, 282 PPI
Technology
Super AMOLED IPS LCD
Screen-to-body
75.79 % 76.28 %
Features
Proximity sensor Scratch-resistant glass (Tempered Glass), Ambient light sensor, Proximity sensor

Hardware

System chip
Qualcomm Snapdragon 450 SDM450 (14 nm) Qualcomm Snapdragon 450 SDM450 (14 nm)
Processor
Octa-core
1800 MHz
ARM Cortex-A53 		Octa-core
2000 MHz
ARM Cortex-A53
GPU
Adreno 506 Adreno 506
RAM
4GB (LPDDR3) 2GB (LPDDR3)
Internal storage
64GB, available to use: 51 GB 16GB, available to use: 8 GB
Storage expansion
microSDXC up to 256 GB microSDXC up to 2000 GB
OS
Android (10, 8.0 Oreo), Samsung TouchWiz UI Android (8.1 Oreo)

Battery

Capacity
3500 mAh 3000 mAh
Type
Li - Polymer

Camera

Rear
Dual camera Single camera
Main camera
16 MP (PDAF, CCD image sensor)
Aperture size: F1.7
Focal length: 26 mm
Sensor size: 1/2.8"
Pixel size: 1.12 μm 		8 MP (PDAF)
Aperture size: F2.0
Sensor size: 1/3"
Pixel size: 1 μm
Second camera
5 MP (Depth information)
Aperture size: F1.9
Focal Length: 24 mm
Sensor size: 1/5"
Pixel size: 1.12 μm
Flash
LED LED
Video recording
1920x1080 (Full HD) (30 fps)
Video calling, Video sharing 		1920x1080 (Full HD) (30 fps)
Video calling, Video sharing
Front
16 MP (Flash, HDR) 5 MP (Flash)

Connectivity & Features

Bluetooth
4.2 5.0
WLAN
802.11 b,g,n
Wi-Fi Direct, Hotspot 		802.11 a,b,g,n,ac,dual-band
Wi-Fi Direct, Hotspot
USB
microUSB, USB 2.0 microUSB, USB 2.0
Hearing aid compatible
M3/T3
Location
GPS, A-GPS, Glonass, BeiDou GPS, A-GPS, Glonass, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Hall (for flip covers) Accelerometer, Compass
Other
ANT+, VoIP, Tethering, Computer sync, OTA sync NFC, VoIP, Tethering, Computer sync, OTA sync

Multimedia

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

Cellular

4G (FDD)
Bands 1(2100), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD) Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 66(AWS-3)
4G (TDD)
Bands 38(2600), 40(2300), 41(2600+)
3G
Bands 5(850), 8(900), 2(1900), 1(2100) Bands 5(850), 8(900), 2(1900), 1(2100)
Data Speed
LTE-A Cat 6 (300/50 Mbit/s), HSPA, HSUPA LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM
Yes
SIM type
Nano SIM Nano SIM
HD Voice
Yes

Buyers information

MSRP
$ 180
In The Box
Charger, microUSB cable, Documentation, Quick Start Guide, Headphones and SIM removal tool.

Availability

Officially announced
Jun 27, 2018 Feb 20, 2019

Alternative variants

International version
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
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
FCC OKs Cingular\'s purchase of AT&T Wireless