LG K51 vs Samsung Galaxy S21+ Specs Comparison

Design

Dimensions
6.57 x 3.07 x 0.33 inches 166.9 x 77.9 x 8.4 mm	6.35 x 2.98 x 0.31 inches 161.5 x 75.6 x 7.8 mm
Weight
7.17 oz (203.4 g)	7.13 oz (202.0 g)
Materials
	Back: Glass (Corning Gorilla Glass Victus) Frame: Aluminum
Resistance
Yes; MIL-STD-810 certified	Water, Dust; IP68
Biometrics
Fingerprint (touch)	2D Face unlock, Ultrasonic in-screen fingerprint
Keys
Left: Volume control; Right: Lock/Unlock key	Right: Volume control, Lock/Unlock key
Colors
Titan gray	Phantom silver, Black, Violet

Display

Size
6.5-inch	6.7-inch
Resolution
1560x720px, 19.5:9 ratio, 264 PPI	2400x1080px, 20:9 ratio, 393 PPI
Technology
IPS LCD	Dynamic AMOLED
Refresh rate
	120Hz (adaptive)
Screen-to-body
79.70 %	88.63 %
Peak brightness
	1300 cd/m2 (nit)
Features
Ambient light sensor, Proximity sensor	HDR support, Scratch-resistant glass (Corning Gorilla Glass Victus), Ambient light sensor, Proximity sensor

Hardware

System chip
MediaTek Helio P22 MT6762 (12 nm)	Qualcomm Snapdragon 888 (5 nm)
Processor
Octa-core 2000 MHz Arm Cortex-A53	Octa-core 1x2.84GHz Kryo 680 3x2.42GHz Kryo 680 4x1.80GHz Kryo 680
GPU
IMG PowerVR GE8320	Adreno 660
RAM
3GB	8GB (LPDDR5)
Internal storage
32GB, available to use: 18 GB	128GB (UFS 3.0)
Storage expansion
microSDXC up to 2000 GB	not expandable
OS
Android (10)	Android (13, 12, 11), Samsung One UI

Battery

Capacity
4000 mAh	4800 mAh
Type
Li - Ion	Li - Polymer
Charging
	Qualcomm Quick Charge 2.0, USB Power Delivery, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging, Reverse wireless charging
Charge speed
	Wired: 25.0W Wireless: 15.0W

PhoneArena Battery Tests

Battery Life Estimate

Untested

Browsing

Untested

Video

Untested

Gaming

Untested

Battery Life Estimate

5h 26min

Browsing

10h 50min

Video

8h 27min

Gaming

8h 36min

Learn more on our PhoneArena Battery Test Results page

Camera

Rear
Triple camera	Triple camera
Main camera
13 MP (PDAF) Aperture size: F1.8 Sensor size: 1/3" Pixel size: 1.12 μm	12 MP (OIS, PDAF) Aperture size: F1.8 Focal length: 26 mm Sensor size: 1/1.76" Pixel size: 1.8 μm
Second camera
5 MP (Ultra-wide) Aperture size: F2.2 Sensor size: 1/5" Pixel size: 1.12 μm	12 MP (Ultra-wide, PDAF) Aperture size: F1.8 Focal Length: 13 mm Sensor size: 1/2.55" Pixel size: 1.4 μm
Third camera
2 MP (Depth information) Sensor size: 1/5" Pixel size: 1.75 μm	64 MP (Telephoto, OIS, PDAF) Aperture size: F2.0 Focal Length: 29 mm Sensor size: 1/2.55" Pixel size: 0.8 μm
Flash
LED	LED
Video recording
1920x1080 (Full HD) Picture-taking during video recording	7680x4320 (8K UHD) (24 fps), 3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps) OIS, HDR, Hyperlapse, Video light, EIS
Front
13 MP, Video capture: 1920x1080 (Full HD)	10 MP (PDAF, HDR), Video capture: 3840x2160 (4K UHD) (60 fps)

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,ax(Wi-Fi 6),dual-band MIMO, Wi-Fi Direct, Hotspot
USB
Type-C, USB 2.0	Type-C, USB 3.2
Hearing aid compatible
M3/T3	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, Compass, Hall (for flip covers), Barometer
Other
	NFC, ANT+

Multimedia

Headphones
3.5mm jack	No 3.5mm jack
Speakers
Earpiece, Multiple speakers	Earpiece, Multiple speakers
Features
DTS:X Virtual Surround	32-Bit DAC, Dolby Atmos, aptX, Dolby Digital, Dolby Digital Plus
Screen mirroring
Wireless screen share	Wireless screen share
Radio
FM	FM
Additional microphone(s)
Noise cancellation	Noise cancellation, Video recording

Cellular

5G
	Bands n2, n5, n12, n25, n41, n66, n71, n77, n260, n261, SA, NSA, Sub-6, mmWave
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), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 30(2300 WCS), 66(AWS-3), 71(600)
4G (TDD)
Bands 41(2600+)	Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46, 48(3600)
3G
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 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
SIM type
Nano SIM	Nano SIM
HD Voice
Yes
VoLTE
Yes

Regulatory Approval

FCC approval
Date approved: Jun 16, 2020 FCC ID value: ZNFL555DL	Date approved: Dec 18, 2020 FCC ID value: A3LSMG996U
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	Head: 0.65 W/kg Body: 0.95 W/kg Simultaneous Transmission: 1.59 W/kg Wireless Router: 1.04 W/kg Phablet: 3.97 W/kg

Buyers information

MSRP
$ 200	$ 1000
In The Box
Charger, USB Cable, SIM Ejector	C to C Data Cable, Ejection Pin

Availability

Officially announced
May 06, 2020	Jan 14, 2021

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 256GB storage

Internal storage	256GB
MSRP	$ 1050

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

for Europe

System chip	Samsung Exynos 2100 (5 nm)
Processor	Octa-core 1x 2.91GHz Cortex-X1 + 3x 2.81GHz Cortex-A78 + 4x 2.2GHz Cortex-A55
GPU	Mali G78 MP14
Weight	7.05 oz (200.0 g)
5G	Bands SA, NSA, Sub-6
FCC approval	Date approved: Dec 18, 2020 FCC ID value: A3LSMG996B
Measured SAR	Head: 0.24 W/kg Body: 0.75 W/kg Simultaneous Transmission: 3.59 W/kg Wireless Router: 1.26 W/kg Phablet: 1.95 W/kg

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 S21+ Specs
PhoneArena Review
	Samsung Galaxy S21+ Review
User Reviews
LG K51 User Reviews	Samsung Galaxy S21+ User Reviews