LG K51 vs Samsung Galaxy A21s 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.

	7.5
LG K51	Samsung Galaxy A21s
Released · May 06, 2020	Released · Jun 19, 2020
6.5-inch	6.5-inch
Triple camera	Quad camera
3GB · 32GB	3GB · 32GB
4000 mAh	5000 mAh

Design

Dimensions
6.57 x 3.07 x 0.33 inches 166.9 x 77.9 x 8.4 mm	6.44 x 2.96 x 0.35 inches 163.7 x 75.3 x 8.9 mm
Weight
7.17 oz (203.4 g)	6.77 oz (192.0 g)
Resistance
Yes; MIL-STD-810 certified
Biometrics
Fingerprint (touch)	2D Face unlock, Fingerprint (touch)
Keys
Left: Volume control; Right: Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Titan gray	Black, White, Blue, Red

Display

Size
6.5-inch	6.5-inch
Resolution
1560x720px, 19.5:9 ratio, 264 PPI	1600x720px, 20:9 ratio, 270 PPI
Technology
IPS LCD	TFT
Screen-to-body
79.70 %	82.94 %
Features
Ambient light sensor, Proximity sensor	Proximity sensor

Hardware

System chip
MediaTek Helio P22 MT6762 (12 nm)	Samsung Exynos 850
Processor
Octa-core 2000 MHz Arm Cortex-A53	Octa-core 8x 2.0GHz Cortex-A55
GPU
IMG PowerVR GE8320	Mali-G76
RAM
3GB	3GB (LPDDR4)
Internal storage
32GB, available to use: 18 GB	32GB (eMMC 5.1), available to use: 19.5 GB
Storage expansion
microSDXC up to 2000 GB	microSDXC up to 512 GB
OS
Android (10)	Android (10), Samsung One UI

Battery

Capacity
4000 mAh	5000 mAh
Type
Li - Ion	Li - Polymer
Charging
	Fast charging

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

Untested

Browsing

Untested

Video

11h 9min

Gaming

7h 48min

Camera

Rear
Triple camera	Quad camera
Main camera
13 MP (PDAF) Aperture size: F1.8 Sensor size: 1/3" Pixel size: 1.12 μm	48 MP (PDAF) Aperture size: F2.0 Focal length: 26 mm Sensor size: 1/2" Pixel size: 0.8 μm
Second camera
5 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/5" Pixel size: 1.12 μm	8 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/4" Pixel size: 1.12 μm
Third camera
2 MP (Depth information) Sensor size: 1/5" Pixel size: 1.75 μm	2 MP (Macro) Aperture size: F2.4
Fourth camera
	2 MP (Depth information) Aperture size: F2.4
Flash
LED	LED
Video recording
1920x1080 (Full HD) Picture-taking during video recording	1920x1080 (Full HD) (30 fps)
Front
13 MP, Video capture: 1920x1080 (Full HD)	13 MP, Video capture: 1920x1080 (Full HD)

Connectivity & Features

Bluetooth
5.0	5.0
WLAN
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
Type-C, USB 2.0	Type-C, USB 2.0
Hearing aid compatible
M3/T3
Location
GPS, A-GPS, Cell ID, Wi-Fi positioning	GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning
Sensors
Accelerometer, Gyroscope, Compass	Accelerometer, Gyroscope
Other
	NFC

Multimedia

Headphones
3.5mm jack	3.5mm jack
Speakers
Earpiece, Multiple speakers	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 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), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 20(800 DD), 28(700 APT)
4G (TDD)
Bands 41(2600+)	Bands 38(2600), 40(2300), 41(2600+)
3G
Bands 1(2100), 2(1900), 4(1700/2100), 5(850), 8(900)	Bands 1(2100), 2(1900), 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	LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
Dual SIM
	Yes
SIM type
Nano SIM	Nano SIM
HD Voice
Yes
VoLTE
Yes

Regulatory Approval

FCC approval
Date approved: Jun 16, 2020 FCC ID value: ZNFL555DL
Measured SAR
Head: 0.66 W/kg Body: 1.20 W/kg Simultaneous Transmission: 1.59 W/kg Wireless Router: 1.27 W/kg Phablet: 3.96 W/kg

Buyers information

MSRP
$ 200	€ 240
In The Box
Charger, USB Cable, SIM Ejector

Availability

Officially announced
May 06, 2020	May 15, 2020

Alternative variants

for Boost Mobile


OS	Android (9.0 Pie)
4G (FDD)	Bands 2(1900), 4(AWS-1), 5(850), 12(700 a), 13(700 c), 25(1900+), 26(850+), 66(AWS-3), 71(600)

with 4GB RAM


RAM	4GB
Internal storage	64GB

for Verizon


4G (FDD)	Bands 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 12(700 a), 13(700 c), 20(800 DD), 66(AWS-3)
MSRP	$ 170

with 6GB RAM


RAM	6GB
Internal storage	64GB

for Metro


4G (FDD)	Bands 1(2100), 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)
4G (TDD)	Bands 38(2600), 41(2600+)
3G	Bands 5(850), 4(1700/2100), 2(1900), 1(2100)

Links

Full specifications
LG K51 Specs	Samsung Galaxy A21s Specs
PhoneArena Review
	Samsung Galaxy A21s Review
User Reviews
LG K51 User Reviews