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LG K31 vs LG K51 vs Samsung Galaxy A52

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

Comparison mode:

Display

Size:

5.7 inches
6.5 inches
6.5 inches

Resolution:

1520 x 720 pixels, 19:9 ratio, 295 PPI
1560 x 720 pixels, 19.5:9 ratio, 264 PPI
2400 x 1080 pixels, 20:9 ratio, 405 PPI

Technology:

IPS LCD
IPS LCD
Super AMOLED

Refresh rate:

90Hz

Screen-to-body:

77.13 %
79.70 %
84.79 %

Features:

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

Hardware

System chip:

MediaTek Helio P22 MT6762
MediaTek Helio P22 MT6762
Qualcomm Snapdragon 750G SM7225

Processor:

Octa-core, 2000 MHz, Arm Cortex-A53, 64-bit, 12 nm
Octa-core, 2000 MHz, Arm Cortex-A53, 64-bit, 12 nm
Octa-core, 2200 MHz, Kryo 570, 64-bit, 8 nm

GPU:

IMG PowerVR GE8320
IMG PowerVR GE8320
Adreno 619

RAM:

2GB
3GB
6GB LPDDR4

Internal storage:

32GB, available to use: 17 GB
32GB, available to use: 18 GB
128GB

Storage expansion:

microSDXC up to 32 GB
microSDXC up to 2000 GB
microSDXC up to 1024 GB

Device type:

Smartphone
Smartphone
Smartphone

OS:

Android (10)
Android (10)
Android (11), Samsung One UI

Battery

Capacity:

3000 mAh
4000 mAh
4500 mAh

Type:

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

Charging:

Qualcomm Quick Charge 2.0

Max charge speed:

Wired: 25.0W

Camera

Rear:

Dual camera
Triple camera
Quad camera

Main camera:

13 MP (PDAF)
13 MP (PDAF)
64 MP (OIS, Autofocus)

Specifications:

Aperture size: F1.8; Sensor size: 1/3"; Pixel size: 1.12 μm
Aperture size: F1.8; Sensor size: 1/3"; Pixel size: 1.12 μm
Aperture size: F1.8; Focal length: 26 mm; Sensor size: 1/1.7"; Pixel size: 0.8 μm

Second camera:

5 MP (Ultra-wide)
5 MP (Ultra-wide)
12 MP (Ultra-wide)

Specifications:

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

Third camera:

2 MP (Depth information)
5 MP (Macro)

Specifications:

Sensor size: 1/5"; Pixel size: 1.75 μm
Aperture size: F2.4; Pixel size: 1.12 μm

Fourth camera:

5 MP (Depth information)

Specifications:

Aperture size: F2.4; Pixel size: 1.12 μm

Video recording:

1920x1080 (Full HD) (30 fps)
1920x1080 (Full HD)
3840x2160 (4K UHD) (30 fps), 1920x1080 (Full HD) (60 fps)

Features:

Picture-taking during video recording
Continuous autofocus, Picture-taking during video recording

Front:

5 MP
13 MP
32 MP

Video capture:

1920x1080 (Full HD)
1920x1080 (Full HD)
3840x2160 (4K UHD) (30 fps)

Design

Dimensions:

5.82 x 2.8 x 0.34 inches (147.8 x 71.1 x 8.6 mm)
6.57 x 3.07 x 0.33 inches (166.9 x 77.9 x 8.4 mm)
6.30 x 2.96 x 0.33 inches (159.9 x 75.1 x 8.4 mm)

Weight:

5.15 oz (146.0 g)
7.17 oz (203.4 g)
6.67 oz (189.0 g)

Materials:

Back: Plastic; Frame: Plastic
Back: Plastic

Resistance:

Yes; MIL-STD-810 certified
Yes; MIL-STD-810 certified
Water, Dust; IP67

Biometrics:

Fingerprint (touch)
Fingerprint (touch)
2D Face unlock, In-screen fingerprint

Keys:

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

Colors:

Silver
Titan gray

Cellular

5G:

n1, n3, n5, n7, n8, n28, n40, n41, n66, n78

LTE (FDD):

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), 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 1(2100), 3(1800), 7(2600), 32(1500 L-band)

LTE (TDD):

Bands 41(2600+)
Bands 41(2600+)
Bands 38(2600), 41(2600+)

UMTS:

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

Data Speed:

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

Dual SIM:

Shared with microSD

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, Loudspeaker
Earpiece, Multiple speakers
Earpiece, Loudspeaker

Features:

DTS:X Virtual Surround
Dolby Atmos

Screen mirroring:

Wireless screen share
Wireless screen share
Wireless screen share

Radio:

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 b, g, n; Wi-Fi Direct, Hotspot
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

USB:

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

Features:

Charging
Charging
Charging, Headphones port, OTG

Location:

GPS, A-GPS, Cell ID, Wi-Fi positioning
GPS, A-GPS, Cell ID, Wi-Fi positioning
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning

Sensors:

Accelerometer
Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass, Hall (for flip covers)

Other:

UMA (Wi-Fi Calling)
NFC

Hearing aid compatible:

M3, T3
M3, T3
M3, T3

Regulatory Approval

FCC approval:

Date approved:

Sep 14, 2020
Jun 16, 2020
Mar 17, 2014

FCC ID value:

ZNFK300AM
ZNFL555DL
A3LSMA526U

Measured SAR:

Head:

0.47 W/kg
0.66 W/kg
0.74 W/kg

Body:

0.91 W/kg
1.20 W/kg
0.53 W/kg

Simultaneous Transmission:

1.26 W/kg
1.59 W/kg
1.51 W/kg

Wireless Router:

1.02 W/kg
1.27 W/kg
0.72 W/kg

Phablet:

3.96 W/kg

Buyers information

Price:

$ 150
$ 200
€ 429

User Manual:

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

In The Box:

Travel Adapter, USB Cable
Charger, USB Cable, SIM Ejector

Availability

Officially announced:

May 06, 2020
Mar 17, 2021
FCC OKs Cingular\'s purchase of AT&T Wireless