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LG K51S vs LG K31 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
LG K51S
LG K31
LG K51S LG K31
Released · Apr 27, 2020
Released · Aug 21, 2020
6.5-inch
5.7-inch
Quad camera
Dual camera
3GB · 64GB
2GB · 32GB
4000 mAh
3000 mAh

Design

Dimensions
6.50 x 3.02 x 0.33 inches
165.2 x 76.7 x 8.3 mm 		5.82 x 2.8 x 0.34 inches
147.8 x 71.1 x 8.6 mm
Weight
6.77 oz (192.0 g) 5.15 oz (146.0 g)
Materials
Back: Plastic
Frame: Plastic
Resistance
Yes; MIL-STD-810 certified Yes; MIL-STD-810 certified
Biometrics
Fingerprint (touch) Fingerprint (touch)
Keys
Left: Volume control, Other; Right: Lock/Unlock key Left: Volume control; Right: Lock/Unlock key
Colors
Titanium, Pink, Blue Silver

Display

Size
6.5-inch 5.7-inch
Resolution
1600x720px, 20:9 ratio, 270 PPI 1520x720px, 19:9 ratio, 295 PPI
Technology
IPS LCD IPS LCD
Screen-to-body
83.97 % 77.13 %
Features
Ambient light sensor, Proximity sensor Ambient light sensor, Proximity sensor

Hardware

System chip
MediaTek Helio P35 MT6765 (12 nm) MediaTek Helio P22 MT6762 (12 nm)
Processor
Octa-core
2300 MHz
Arm Cortex-A53 		Octa-core
2000 MHz
Arm Cortex-A53
GPU
PowerVR GE8320 IMG PowerVR GE8320
RAM
3GB 2GB
Internal storage
64GB (eMMC 5.1) 32GB, available to use: 17 GB
Storage expansion
microSDXC up to 2048 GB microSDXC up to 32 GB
OS
Android (10) Android (10)

Battery

Capacity
4000 mAh 3000 mAh

Camera

Rear
Quad camera Dual camera
Main camera
32 MP (PDAF) 13 MP (PDAF)
Aperture size: F1.8
Sensor size: 1/3"
Pixel size: 1.12 μm
Second camera
5 MP (Ultra-wide) 5 MP (Ultra-wide)
Aperture size: F2.2
Sensor size: 1/5"
Pixel size: 1.12 μm
Third camera
2 MP (Macro)
Fourth camera
2 MP (Depth information)
Flash
LED LED
Video recording
1920x1080 (Full HD) (30 fps) 1920x1080 (Full HD) (30 fps)
Front
13 MP 5 MP, Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
5.0 5.0
WLAN
802.11 b,g,n,ac,dual-band
Wi-Fi Direct, Hotspot 		802.11 b,g,n
Wi-Fi Direct, Hotspot
USB
Type-C microUSB, USB 2.0
Hearing aid compatible
M3/T3
Location
GPS, A-GPS, Glonass, Cell ID, Wi-Fi positioning GPS, A-GPS, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass Accelerometer
Other
NFC UMA (Wi-Fi Calling)

Multimedia

Headphones
3.5mm jack 3.5mm jack
Speakers
Earpiece, Loudspeaker Earpiece, Loudspeaker
Features
DTS:X Virtual Surround
Screen mirroring
Wireless screen share Wireless screen share
Radio
FM
Additional microphone(s)
Noise cancellation

Cellular

4G (FDD)
Bands 1(2100), 3(1800), 7(2600), 8(900), 20(800 DD), 28(700 APT) Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 25(1900+), 26(850+), 66(AWS-3), 71(600)
4G (TDD)
Bands 38(2600) Bands 41(2600+)
3G
Bands 1(2100), 2(1900), 5(850), 8(900) Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)
Data Speed
LTE-A Cat 6 (300/50 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s, UMTS 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
HD Voice
Yes

Regulatory Approval

FCC approval
Date approved: Sep 14, 2020
FCC ID value: ZNFK300AM
Measured SAR
Head: 0.47 W/kg
Body: 0.91 W/kg
Simultaneous Transmission: 1.26 W/kg
Wireless Router: 1.02 W/kg

Buyers information

MSRP
$ 150
In The Box
Travel Adapter, USB Cable

Availability

Officially announced
Feb 18, 2020
FCC OKs Cingular\'s purchase of AT&T Wireless