LG K40 vs LG K51

Compare phone and tablet specifications of up to three devices. Type a model name in the search field of our phone comparison tool or pick a popular device from the ones below.

Display

Size

5.7 inches
6.5 inches

Resolution

1440 x 720 pixels, 18:9 ratio,
282 PPI
1560 x 720 pixels, 19.5:9 ratio,
264 PPI

Technology

IPS LCD
IPS LCD

Screen-to-body

76.28 %
79.70 %

Features

Scratch-resistant glass (Tempered Glass), Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor

Hardware & Performance

System chip

Qualcomm Snapdragon 450 SDM450
MediaTek Helio P22 MT6762

Processor

Octa-core, 2000 MHz, ARM Cortex-A53, 64-bit, 14 nm
Octa-core, 2000 MHz, Arm Cortex-A53, 64-bit, 12 nm

GPU

Adreno 506
IMG PowerVR GE8320

RAM

2GB LPDDR3
3GB

Internal storage

16GB
32GB

Storage expansion

microSDXC up to 2000 GB
microSDXC up to 2000 GB

OS

Android (8.1 Oreo)
Android (9.0 Pie)

Battery

Capacity

3000 mAh
4000 mAh

Type

Li - Polymer, Not user replaceable
Li - Ion, Not user replaceable

Stand-by time (hours)

252 hours
588 hours

Camera

Rear

Single camera
Triple camera

Main camera

8 MP (PDAF)
13 MP (PDAF)

Specifications

Aperture size: F2.0; Sensor size: 1/3"; Pixel size: 1 μm
Aperture size: F1.8

Second camera

 
5 MP (Ultra-wide)

Specifications

 
Aperture size: F2.2

Third camera

 
2 MP (Depth information)

Video recording

1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD)

Features

Video calling, Video sharing
 

Front

5 MP (Flash)
13 MP

Design

Dimensions

6.02 x 2.83 x 0.33 inches (153.0 x 71.9 x 8.3 mm)
6.57 x 3.07 x 0.33 inches (166.96 x 77.92 x 8.47 mm)

Weight

5.11 oz (145 g)
the average is 6.5 oz (184 g)
7.20 oz (204 g)
the average is 6.5 oz (184 g)

Materials

Back: Plastic
 

Resistance

Shock; MIL-STD-810 certified
 

Biometrics

Fingerprint (touch)
Fingerprint (touch)

Colors

Black, Gray, Blue
Black

Cellular

Carrier locked phone

 
Yes

LTE (FDD)

Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 66(AWS-3)
Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 14(700 PS), 25(1900+), 26(850+), 66(AWS-3), 71(600)

LTE (TDD)

 
Bands 41(2600+)

UMTS

850, 900, 1900, 2100 MHz
850, 900, 1700/2100, 1900, 2100 MHz

Data Speed

LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

SIM type

Nano SIM
Nano SIM

HD Voice

Yes
 

VoLTE

 
Yes

Multimedia

Headphones

3.5mm jack
3.5mm jack

Features

Album art cover, Background playback
DTS:X Virtual Surround

Connectivity & Features

Bluetooth

5.0
5.0

Wi-Fi

802.11 a, b, g, n, ac, dual-band; Hotspot, Wi-Fi Direct
802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot

USB

microUSB, USB 2.0
Type-C (reversible), USB 2.0

Features

Mass storage device, OTG, Charging
Charging

Sensors

Accelerometer, Compass
Accelerometer

Other

NFC, VoIP, Tethering, Computer sync, OTA sync
 

Phone features

Notifications

Haptic feedback, Music ringtones, Vibration
 

Other features

Voice dialing, Voice commands, Voice recording, TTY/TDD
 

Shopping information

In The Box

 
Charger, SIM Card Installed, USB 2.0 Cable, Important Information Booklet

MSRP

$ 180
$ 150
This copy is for your personal, non-commercial use only. You can order presentation-ready copies for distribution to your colleagues, clients or customers at https://www.parsintl.com/phonearena or use the Reprints & Permissions tool that appears at the bottom of each web page. Visit https://www.parsintl.com/ for samples and additional information.
FCC OKs Cingular's purchase of AT&T Wireless