Select City

Samsung Galaxy S21 5G vs Samsung Galaxy A51

Key Feature Comparison

7.6

Samsung Galaxy S21 5G

Check Price
close
6.9

Samsung Galaxy A51

Check Price
close
Add more phone to compare

At a Glance

Show differences only

Octa core (2.9 GHz, Single core, Cortex X1 + 2.8 GHz, Tri core, Cortex A78 + 2.2 GHz, Quad core, Cortex A55)

Samsung Exynos 2100, Mali-G78 MP14

Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)

Samsung Exynos 9 Octa 9611, Mali-G72 MP3

4000 mAh

Li-ion, Fast, 25W

4000 mAh

Li-ion, Fast, 15W

6.2 inches

424 ppi, FHD

6.5 inches

405 ppi, FHD

Triple, 12MP + 64MP + 12MP

7680x4320 @ 24 fps, 3840x2160 @ 30 fps, 1920x1080 @ 60 fps, 1280x720 @ 960 fps

Quad, 48MP + 12MP + 5MP + 5MP

3840x2160 @ 30 fps

5G

Dual SIM, GSM+GSM

4G

Dual SIM, GSM+GSM

Detailed Specs

Screen Size

6.2 inches
6.5 inches

Screen Type

AMOLED
Super AMOLED

Screen Resolution

1080 x 2400 pixels
1080 x 2400 pixels

Pixel Density

424 ppi
405 ppi

Aspect Ratio

20:09
20:09

Screen Protection

Corning Gorilla Glass
Gorilla Glass 3

Screen to Body Ratio

85.92%
87.44%

Screen Design

Punch hole
Punch hole

Screen Refresh Rate

120 Hz
-

Screen Quality

FHD
FHD

Peak Brightness

1300 nits
-

Phone Variants

8GB 256GB, 8GB 128GB
8GB 128GB, 6GB 128GB

Expandable Storage

No
Yes

Storage Type

UFS 3.1
UFS 2.0

OTG Support

Yes
Yes

RAM Type

-
LPDDR4X

Expandable Storage Capacity

-
Yes, 512 GB

Sensors

Light sensor, Proximity sensor, Accelerometer, Barometer, Compass, Gyroscope
Light sensor, Proximity sensor, Accelerometer, Gyroscope

Operating System

Android v11
Android v10 (Q)

GPU

Mali-G78 MP14
Mali-G72 MP3

Chipset

Samsung Exynos 2100
Samsung Exynos 9 Octa 9611

CPU

Octa core (2.9 GHz, Single core, Cortex X1 + 2.8 GHz, Tri core, Cortex A78 + 2.2 GHz, Quad core, Cortex A55)
Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)

Custom User Interface

Samsung One UI
Samsung One UI

Clock Speed

2.9 GHz
2.3 GHz

Architecture

64 bit
64 bit

Process Technology

5 nm
10 nm

Battery Capacity

4000 mAh
4000 mAh

Battery Removable

No
No

Battery Type

Li-ion
Li-ion

Charger Type

Fast, 25W
Fast, 15W

USB Type-C

Yes
Yes

Fast Charging

Yes
Yes

Wireless Charging

Yes
-

Announced On

14-Jan-21
5-Dec-19

Market Status

Available
Available

Brand

Samsung
Samsung

Model Number

SM-G991BZVDINU
SM-A515FZB1INS/SM-A515FZBWINS

Price Status

Confirmed
Confirmed

Price

Rs. 69,450
Rs. 20,450

GPS

Yes A-GPS, Glonass
Yes A-GPS, Glonass

Audio Features

Dolby AtmosNoise cancellation microphoneStereo SpeakersStereo Speakers by AKG
Dolby Atmos

NFC

Yes
Yes

Network Support

5G
4G

Bluetooth

Yes
Yes

FM Radio

No
-

3.5mm Audio Jack

No
Yes

SIM Size

SIM1: Nano, SIM2: Nano
SIM1: Nano, SIM2: Nano

Wi-Fi

Yes, Wi-Fi 802.11, a/ac/b/g/n/n 5GHz
Yes, Wi-Fi 802.11, ac/b/g/n/n 5GHz

Bluetooth Type

v5.1
v5.0

Audio Jack

USB Type-C
3.5 mm

SIM Slot(s)

Dual SIM, GSM+GSM
Dual SIM, GSM+GSM

eSIM

No
No

Wi-Fi Features

Mobile Hotspot
Wi-Fi Direct, Mobile Hotspot

VoLTE

Yes
Yes

SIM 1 Bands

4G Bands: TD-LTE 2300(band 40), FD-LTE 1800(band 3), 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz, 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz, GPRS: Available, EDGE: Available...
4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41), FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 700(band 28) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 13) / 700(band 17) / 800(band 20) / 850(band 26), 3G Bands: UMTS 1...

SIM 2 Bands

4G Bands: TD-LTE 2300(band 40), FD-LTE 1800(band 3), 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz, 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz, GPRS: Available, EDGE: Available...
4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41), FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 700(band 28) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 13) / 700(band 17) / 800(band 20) / 850(band 26), 3G...

Front Video Recording

3840x2160 @ 30 fps
1920x1080 @ 30 fps

Front Camera Features

Dual video call, Auto-HDR
HDR

Front Camera Setup

Single, 10MP
Single, 32MP

Front Camera 1 Resolution

10 MP
32 MP

Front Camera 1 Type

f/2.2, Wide Angle Primary Camera
f/2.2 Primary Camera

Front Camera 1 Lens

26 mm focal length, 3.2" sensor size, 1.22 micrometre pixel size
2.8" sensor size, 0.8 micrometre pixel size

Front Aperture

f/2.2
f/2.2

Front Flash

-
No

Weight

171 grams
172 grams

Colors

Phantom Violet, Phantom Gray, Phantom White, Phantom Pink
Prism Crush White, Prism Crush Black, Prism Crush Pink, Prism Crush Blue

Build

Glass front (Gorilla Glass Victus), plastic back, aluminum frame
Back: Plastic

Dimensions

151.7 x 71.2 x 7.9 mm
158.5 x 73.6 x 7.9 mm

SAR Value

-
Head: 0.598 W/kg

OIS

Yes
No

Rear Flash

Yes, LED Flash
Yes, LED Flash

Rear Video Recording

7680x4320 @ 24 fps, 3840x2160 @ 30 fps, 1920x1080 @ 60 fps, 1280x720 @ 960 fps
3840x2160 @ 30 fps

Rear Camera Features

Digital Zoom, Auto Flash, Face detection, Touch to focus
8 x Digital Zoom, Auto Flash, Face detection, Touch to focus

Rear Camera Setup

Triple, 12MP + 64MP + 12MP
Quad, 48MP + 12MP + 5MP + 5MP

Rear Camera 1 Resolution

12 MP
48 MP

Rear Camera 1 Type

f/1.8, Wide Angle Primary Camera
f/2.0 (upto 8x Digital Zoom) Primary Camera

Rear Camera 1 Lens

26 mm focal length, 1.7" sensor size, 1.8 micrometre pixel size
26 mm focal length, 2.25" sensor size, 0.8 micrometre pixel size

Rear Camera 2 Resolution

64 MP
12 MP

Rear Camera 2 Type

f/2.0 Telephoto Camera
f/2.2, Wide Angle, Ultra-Wide Angle Camera

Rear Camera 2 Lens

28 mm focal length, 1.7" sensor size, 0.8 micrometre pixel size
-

Rear Camera 3 Resolution

12 MP
5 MP

Rear Camera 3 Type

f/2.2, Wide Angle, Ultra-Wide Angle Camera
f/2.4, Macro Camera

Rear Camera 3 Lens

13 mm focal length, 2.55" sensor size, 1.4 micrometre pixel size
-

Rear Aperture

f/1.8
f/2.0

Rear Camera 4 Resolution

-
5 MP

Rear Camera 4 Type

-
f/2.2, Depth Camera

Rear Sensor

-
ISO-CELL

Fingerprint Scanner

Yes
Yes

Fingerprint Scanner Position

On-Screen
On-Screen

Fingerprint Scanner Type

Ultrasonic
Optical

Face Unlock

Yes
Yes

You May Also Read

Realme Mobile Price List
Oppo Mobile Price List
OnePlus Mobile Price List
Nokia Mobile Price List
Samsung Mobile Price List

Recent News

Apple iPhone 16 Gets A Huge Price Drop, But With This Condition
25th May 2025
Leak Alert For Vivo T4 Ultra: Know The Specs
25th May 2025
Xiaomi Devices Eligible For Android 16 Update: Full Device List
25th May 2025
US Tariffs On Apple and Samsung Phones Outside America: Details Here
24th May 2025
Gamers Delight: SteamOS Release Will Support PCs And Handhelds
24th May 2025

Tips & Tricks

How To Get Free Canva Pro: A Detailed Guide
24th May 2025
How to Delete iPhone Backups on Mac or Windows: Complete Guide
23rd May 2025
ColorOS Hidden Features: 7 Tricks You Didn’t Know Existed
16th May 2025
How to Use The Instagram Edits App: 10 Pro Tips And Best Features
14th May 2025
Easy Ways To Block Ads On Truecaller: Free And Paid Options [2025]
13th May 2025

Popular Leaks

POCO F7 Specs Leak, Will Launch With 7000mAh Battery
12th Jan 2025
iQOO and POCO to Enter Offline Market in India; Here’s When
23rd Nov 2021
OPPO Reno 14 Pro Leaks: New Design, Camera Details And Launch Hints
10th Apr 2025
Here’s How You Can Claim OnePlus 3, 3T, 5, 5T, 6, 6T Free Battery Replacement Offer in India
27th Aug 2021
iPhone 16 Leak Reveals It Will Feature A Massive Design Overhaul
6th Feb 2024