LG K40S vs Samsung Galaxy A3 (2017)

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900 - EMEA; HSDPA 850, 900, 1700(AWS), 1900, 2100 - SEA, LATAM
3G network

HSDPA 850, 900, 1900, 2100

HSDPA 850, 900, 1900, 2100 - EMEA; HSDPA 850, 900, 1700(AWS), 1900, 2100 - SEA, LATAM
4G network

LTE frequency band 1(2100), 3(1800), 7(2600), 8(900), 20(800)

LTE frequency band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800), 40(2300) - EMEA; LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 20(800), 28(700), 38(2600), 40(2300), 41(2500) - SEA, LATAM
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A (2CA), Cat6, 300 Mbps download, 50 Mbps upload

-
LTE-A speed

-

LTE-A, (2CA) Cat6, 300 Mbps download, 50 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Plastic

-
SIM

Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)

Single SIM (Nano-SIM) or Dual SIM (Nano-SIM, dual stand-by)
Height

156.3 mm

135.4 mm
Width

73.9 mm

66.2 mm
Thickness

8.6 mm

7.9 mm
Weight

-

135 g
Waterproof

-

1.5 m and 30 minutes
Dust proof

-

Yes
MIL-STD-810G

Yes

-
Colors

Black, Blue

Black Sky, Blue Mist, Gold Sand, Peach Cloud

Display
Display type

IPS LCD capacitive touchscreen

Super AMOLED capacitive touchscreen
Physical size

6.1 inches

4.7 inches
Resolution

720 x 1520 pixels

720 x 1280 pixels
Pixel density

276 ppi

312 ppi
Display colors

16777216

16777216
Protection

-

Corning Gorilla Glass
Multitouch

Yes

Yes

Main camera
Camera type

Dual

-
Main camera

13 MP, f/2.2 , 26 mm

13 MP, f/1.9
5 MP
Primary camera resolution

4160 x 3120 pixels

-
Primary camera video

1080p@30fps

1080p@30fps
Primary camera Autofocus

-

autofocus
Primary camera flash

dual-LED flash

LED flash
Primary camera phase detection autofocus

phase detection autofocus

-
Camera features

Autofocus, continuous shooting, digital zoom, digital image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode

Geo-tagging, face detection, panorama, touch focus

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
Wi-Fi display

Yes

-
WLAN WiFi Dual Band

-

Yes
USB

microUSB 2.0

Type-C reversible connector
USB On-The-Go

Yes

-
Bluetooth

v5.0

v4.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Infrared

Yes

-
NFC

Yes(market dependent)

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
BDS

Yes

Yes

Features
Messaging SMS

-

SMS(threaded view)
Messaging MMS

-

MMS
Messaging Email

-

Email
Messaging IM

-

IM
Messaging Push Mail

-

Push Mail
Java

-

No
Sensors

Accelerometer, fingerprint, light, proximity

Fingerprint (front-mounted), accelerometer, barometer, compass, gyro, proximity