LG K51S vs LG K31 Specs Comparison

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

LG K51S LG K31
Released · Apr 27, 2020
Released · Aug 21, 2020
6.5-inch · 1600 x 720 px
5.7-inch · 1520 x 720 px
32 MP Main · 13 MP Selfie
13 MP Main · 5 MP Selfie
3GB · 64GB
2GB · 32GB
4000 mAh
3000 mAh
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Display

Size
6.5-inch 5.7-inch
Resolution
1600 x 720 px, 20:9 ratio, 270 PPI 1520 x 720 px, 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, 64-bit Octa-core, 2000 MHz, Arm Cortex-A53, 64-bit
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)
Device type
Smartphone Smartphone

Battery

Capacity
4000 mAh 3000 mAh
Type
Not user replaceable Not user replaceable

Camera

Rear
Quad camera Dual camera
Main camera
32 MP (PDAF) 13 MP (PDAF)
Specifications:
Aperture size: F1.8
Sensor size: 1/3"
Pixel size: 1.12 μm
Second camera
5 MP (Ultra-wide) 5 MP (Ultra-wide)
Specifications:
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)

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

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

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

Connectivity & Features

Bluetooth
5.0 5.0
Wi-Fi
802.11 b,g,n,ac,dual-band
Wi-Fi Direct, Hotspot
802.11 b,g,n
Wi-Fi Direct, Hotspot
USB
Type-C (reversible), Features: Charging microUSB, USB 2.0, Features: Charging
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)

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
User Manual
This is the official LG K31 User Guide in English provided from the manufacturer.
In The Box
Travel Adapter, USB Cable

Availability

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