LG K51 vs LG K22 vs LG K31

Compare phone and tablet specifications of up to three devices at once.

Display

Size:

6.5 inches
6.2 inches
5.7 inches

Resolution:

1560 x 720 pixels, 19.5:9 ratio, 264 PPI
1520 x 720 pixels, 19:9 ratio, 271 PPI
1520 x 720 pixels, 19:9 ratio, 295 PPI

Technology:

IPS LCD
IPS LCD
IPS LCD

Screen-to-body:

79.70 %
81.70 %
77.13 %

Features:

Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor
Ambient light sensor, Proximity sensor

Hardware

System chip:

MediaTek Helio P22 MT6762
Qualcomm Snapdragon 215 QM215
MediaTek Helio P22 MT6762

Processor:

Octa-core, 2000 MHz, Arm Cortex-A53, 64-bit, 12 nm
Quad-core, 1300 MHz, Cortex-A53, 64-bit, 28 nm
Octa-core, 2000 MHz, Arm Cortex-A53, 64-bit, 12 nm

GPU:

IMG PowerVR GE8320
Adreno 308
IMG PowerVR GE8320

RAM:

3GB
2GB
2GB

Internal storage:

32GB, available to use: 18 GB
32GB (eMMC 5.1), available to use: 21 GB
32GB, available to use: 17 GB

Storage expansion:

microSDXC up to 2000 GB
microSDXC up to 32 GB
microSDXC up to 32 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (10)
Android (10)
Android (10)

Battery

Capacity:

4000 mAh
3000 mAh
3000 mAh

Type:

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

Camera

Rear:

Triple camera
Dual camera
Dual camera

Main camera:

13 MP (PDAF)
13 MP
13 MP (PDAF)

Specifications:

Aperture size: F1.8; Sensor size: 1/3"; Pixel size: 1.12 μm
Aperture size: F2.2; Focal length: 27 mm; Sensor size: 1/3.1"; Pixel size: 1.12 μm
Aperture size: F1.8; Sensor size: 1/3"; Pixel size: 1.12 μm

Second camera:

5 MP (Ultra-wide)
2 MP (Macro)
5 MP (Ultra-wide)

Specifications:

Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm
Aperture size: F2.4
Aperture size: F2.2; Sensor size: 1/5"; Pixel size: 1.12 μm

Third camera:

2 MP (Depth information)

Specifications:

Sensor size: 1/5"; Pixel size: 1.75 μm

Video recording:

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

Features:

Picture-taking during video recording

Front:

13 MP
5 MP (Wide Angle)
5 MP

Video capture:

1920x1080 (Full HD)
1920x1080 (Full HD)
1920x1080 (Full HD)

Design

Dimensions:

6.57 x 3.07 x 0.33 inches (166.9 x 77.9 x 8.4 mm)
6.13 x 2.97 x 0.33 inches (155.7 x 75.4 x 8.4 mm)
5.82 x 2.8 x 0.34 inches (147.8 x 71.1 x 8.6 mm)

Weight:

7.17 oz (203.4 g)
6.00 oz (169.5 g)
5.15 oz (146.0 g)

Materials:

Back: Plastic; Frame: Plastic
Back: Plastic; Frame: Plastic

Resistance:

Yes; MIL-STD-810 certified
MIL-STD-810G certified
Yes; MIL-STD-810 certified

Biometrics:

Fingerprint (touch)
Fingerprint (touch)
Fingerprint (touch)

Keys:

Left: Volume control; Right: Lock/Unlock key
Left: Other; Right: Volume control, Lock/Unlock key
Left: Volume control; Right: Lock/Unlock key

Colors:

Titan gray
Titan, Blue, Red
Silver

Cellular

LTE (FDD):

Bands 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 12(700 a), 13(700 c), 20(800 DD), 25(1900+), 26(850+), 66(AWS-3), 71(600)
Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 25(1900+), 26(850+), 66(AWS-3), 71(600)
Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 25(1900+), 26(850+), 66(AWS-3), 71(600)

LTE (TDD):

Bands 41(2600+)
Bands 41(2600+)
Bands 41(2600+)

UMTS:

Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)
Bands 5(850), 8(900), 4(1700/2100), 2(1900), 1(2100)

Data Speed:

LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE Cat 4 (150/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A Cat 7 (300/100 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s

Dual SIM:

Yes

SIM type:

Nano SIM
Nano SIM
Nano SIM

HD Voice:

Yes
Yes

VoLTE:

Yes

Multimedia

Headphones:

3.5mm jack
3.5mm jack
3.5mm jack

Speakers:

Earpiece, Multiple speakers
Earpiece, Loudspeaker
Earpiece, Loudspeaker

Features:

DTS:X Virtual Surround

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

FM
FM
FM

Additional microphone(s):

for Noise cancellation
for Noise cancellation
for Noise cancellation

Connectivity & Features

Bluetooth:

5.0
5.0
5.0

Wi-Fi:

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

USB:

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

Features:

Charging
Charging, Mass storage device
Charging

Location:

GPS, A-GPS, Cell ID, Wi-Fi positioning
GPS, A-GPS, Cell ID, Wi-Fi positioning
GPS, A-GPS, Cell ID, Wi-Fi positioning

Sensors:

Accelerometer, Gyroscope, Compass
Accelerometer, Compass
Accelerometer

Other:

UMA (Wi-Fi Calling)

Hearing aid compatible:

M3, T3
M3, T3
M3, T3

Buyers information

Price:

$ 200
$ 90
$ 150

User Manual:

This is the official LG K51 User Guide in English provided from the manufacturer.
This is the official LG K31 User Guide in English provided from the manufacturer.

In The Box:

Charger, USB Cable, SIM Ejector
Power brick, USB Cable, Sim Card extractor tool
Travel Adapter, USB Cable

Availability

Officially announced:

May 06, 2020
Oct 12, 2020
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