Samsung Galaxy A51 vs LG K51 Specs Comparison

Availability

Officially announced
Dec 12, 2019	May 06, 2020
Prices (MSRP)
$400	$200

Design

Dimensions
6.24 x 2.90 x 0.31 inches 158.5 x 73.6 x 7.9 mm	6.57 x 3.07 x 0.33 inches 166.9 x 77.9 x 8.4 mm
Weight
6.07 oz / 172.0 g	7.17 oz / 203.4 g
Materials
Back: Plastic Frame: Plastic
Resistance
	Yes; MIL-STD-810 certified
Biometrics
2D Face unlock, Optical in-screen fingerprint	Fingerprint (touch)
Keys
Right: Volume control, Lock/Unlock key	Left: Volume control; Right: Lock/Unlock key
Colors
Prism Crush black, Prism Crush white, Prism Crush pink, Prism Crush blue	Titan gray

Display

Size
6.5-inch, 87.37% screen-to-body	6.5-inch, 79.70% screen-to-body
Type
Super AMOLED, 60Hz	IPS LCD
Resolution
2400x1080px, 20:9 ratio, 405 PPI	1560x720px, 19.5:9 ratio, 264 PPI
Protection
Corning Gorilla Glass 3

Hardware

System chip
Samsung Exynos 9611 (10 nm)	MediaTek Helio P22 MT6762 (12 nm)
Processor
Octa-core 2300 MHz 4x2.3GHz Cortex-A73 4x1.7G​Hz Cortex-A53	Octa-core 2000 MHz Arm Cortex-A53
GPU
Mali-G72 MP3	IMG PowerVR GE8320
Memory
4GB (LPDDR4)/128GB 6GB/128GB	3GB/32GB
Storage expansion
microSDXC up to 512 GB	microSDXC up to 2000 GB
OS
Android (11, 10)	Android (10)

Battery

Type
4000 mAh, Li - Polymer	4000 mAh, Li - Ion
Charging
Fast charging

PhoneArena Battery Tests

Battery Life Estimate

5h 22min

Browsing

11h 35min

Video

8h 35min

Gaming

6h 40min

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Quad camera	Triple camera
Main camera
48 MP (PDAF) Aperture size: F2.0 Focal length: 26 mm Sensor size: 1/2" Pixel size: 0.8 μm	13 MP (PDAF) Aperture size: F1.8 Sensor size: 1/3" Pixel size: 1.12 μm
Second camera
12 MP (Ultra-wide) Aperture size: F2.2 Focal Length: 13 mm Pixel size: 1.12 μm	5 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/5" Pixel size: 1.12 μm
Third camera
5 MP (Macro) Aperture size: F2.4 Focal Length: 40 mm	2 MP (Depth information) Sensor size: 1/5" Pixel size: 1.75 μm
Fourth camera
5 MP (Depth information) Aperture size: F2.2 Sensor size: 1/5" Pixel size: 1.12 μm
Flash
LED	LED
Video recording
4K UHD (30 fps), 1080p (120 fps), 720p (240 fps) Hyperlapse, EIS	1080p Picture-taking during video recording
Front
32 MP (HDR) Video capture: 1080p	13 MP Video capture: 1080p

Connectivity & Features

Bluetooth
5.0	5.0
WLAN
a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac	a,b,g,n,ac,dual-band Wi-Fi Direct, Hotspot 802.11 a, b, g, n, ac
USB
Type-C, USB 2.0	Type-C, USB 2.0
Sensors
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Ambient light sensor, Proximity sensor	Accelerometer, Gyroscope, Compass, Ambient light sensor, Proximity sensor
Hearing aid compatible
	M3/T3
Location
GPS, A-GPS, Glonass, Galileo, BeiDou, Cell ID, Wi-Fi positioning	GPS, A-GPS, Cell ID, Wi-Fi positioning
Other
NFC, ANT+

Multimedia

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

Cellular

4G (FDD) Bands
1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 20, 25, 26, 28, 29, 30, 66, 71	2, 3, 4, 5, 7, 12, 13, 20, 25, 26, 66, 71
4G (TDD) Bands
38, 39, 41	41
3G Bands
1, 2, 4, 5, 8	1, 2, 4, 5, 8
Data Speed
LTE-A, 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
SIM type
Nano SIM	Nano SIM
HD Voice
	Yes
VoLTE
	Yes

Regulatory Approval

FCC approval
Date approved: Nov 28, 2019 FCC ID value: A3LSMA515FN	Date approved: Jun 16, 2020 FCC ID value: ZNFL555DL
Measured SAR
Head: 0.89 W/kg Body: 1.18 W/kg Simultaneous Transmission: 1.56 W/kg Wireless Router: 1.12 W/kg Phablet: 2.76 W/kg	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

Alternative variants

with 128GB storage

Memory	6GB/128GB

for Boost Mobile

OS	Android (9.0 Pie)
4G (FDD) Bands	2, 4, 5, 12, 13, 25, 26, 66, 71

for Verizon

4G (FDD) Bands	2, 3, 4, 5, 7, 13, 20, 28, 66
3G Bands	5, 8, 2, 1

for Verizon

4G (FDD) Bands	2, 3, 4, 5, 7, 12, 13, 20, 66
Prices (MSRP)	$170

for AT&T

4G (FDD) Bands	2, 4, 5, 12, 13, 25, 26, 66, 71
4G (TDD) Bands	41

for Metro

4G (FDD) Bands	1, 2, 3, 4, 5, 7, 12, 13, 20, 25, 26, 66, 71
4G (TDD) Bands	38, 41
3G Bands	5, 4, 2, 1

for Sprint

4G (FDD) Bands	2, 4, 5, 12, 13, 25, 26, 66, 71
4G (TDD) Bands	41

for Europe

4G (FDD) Bands	1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 20, 26, 28, 66
4G (TDD) Bands	38, 40, 41
Dual SIM	Yes

Links

Full specifications
Samsung Galaxy A51 Specs	LG K51 Specs
PhoneArena Review
Samsung Galaxy A51 Review
User Reviews
Samsung Galaxy A51 User Reviews	LG K51 User Reviews