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Samsung Galaxy S21 vs OnePlus 9

Summary
Performance

Samsung Exynos 2100

Octa Core (upto 2.9 GHz)

8 GB RAM

Snapdragon 888

Octa Core (upto 2.84 GHz)

8 GB RAM

Snapdragon 8 Elite

Octa Core (upto 4.32 GHz)

12 GB RAM

Display

6.2" (15.75 cm)

Dynamic AMOLED 2x

1080x2400 px (FHD+)

120 Hz Refresh Rate

6.55" (16.64 cm)

Fluid AMOLED

1080x2400 px (FHD+)

120 Hz Refresh Rate

6.32" (16.05 cm)

ProXDR LTPO

1216x2640 px (FHD+)

120 Hz Refresh Rate

Rear Camera

12 MP Wide Angle Primary Camera

64 MP Telephoto Camera (upto 1.1x Optical Zoom)

12 MP Ultra-Wide Angle Camera

48 MP Wide Angle Primary Camera

50 MP Ultra-Wide Angle Camera

2 MP Mono Camera

50 MP Wide Angle Primary Camera

50 MP Telephoto Camera (upto 2x Optical Zoom)

N/A

N/A

Front Camera

10 MP Wide Angle Lens

16 MP Wide Angle Lens

32 MP Wide Angle Lens

Battery

4000 mAh

25W Fast Charging

Wireless Charging

4500 mAh

65W Warp Charging

No Wireless Charging

5850 mAh

80W Super VOOC Charging

No Wireless Charging

Storage

128 GB

UFS 3.1

128 GB

UFS 3.1

256 GB

UFS 4.0

Expert Rating

4.0/5

Read Expert Review

3.5/5

Read Expert Review

8.0/10

User Ratings

★★★★★
★★★★★

4.2/5 based on 740 ratings

★★★★★
★★★★★

4.2/5 based on 16,350 ratings

Benchmarks

639,170AnTuTu Score

8h 22m Battery Life (PC Mark)

721,282AnTuTu Score

10h 28m Battery Life (PC Mark)

2,581,355AnTuTu Score

16h 34m Battery Life (PC Mark)

Compare Prices
Samsung Galaxy S21 is permanently discontinued.
Rs. 27,999 @Flipkart Buy
Not available in any other store
Rs. 54,999 @Amazon Buy
Not available in any other store
General
Launch Date

April 15, 2021 (Official)

June 5, 2025 (Official)

Operating System

Android v11

Android v11

Android v15

OS Updates

4 Years

Security Updates

6 Years

Custom UI

Samsung One UI

Oxygen OS

Oxygen OS

Performance
Very Good
Very Good
Best in Class
Chipset

Samsung Exynos 2100

Qualcomm Snapdragon 888

Qualcomm Snapdragon 8 Elite

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 (2.84 GHz, Single core, Kryo 680 + 2.42 GHz, Tri core, Kryo 680 + 1.8 GHz, Quad core, Kryo 680)

Octa core (4.32 GHz, Dual core, Oryon + 3.53 GHz, Hexa Core, Oryon)

Architecture

64 bit

64 bit

64 bit

Fabrication

5 nm

5 nm

3 nm

Graphics (GPU)

Mali-G78 MP14

Adreno 660

Adreno 830

RAM

8 GB

8 GB / 12 GB

12 GB

RAM Type

LPDDR5

LPDDR5

LPDDR5X

Display
Excellent
Excellent
Excellent
Display Type

Dynamic AMOLED 2x

Fluid AMOLED

ProXDR LTPO

Screen Size

6.2 " (15.75 cm)

6.55 " (16.64 cm)

6.32 " (16.05 cm)

Resolution

1080x2400 px (FHD+)

1080x2400 px (FHD+)

1216x2640 px (FHD+)

Brightness

1300 nits

1100 nits

HBM Brightness

1600 nits

Refresh Rate

120 Hz

120 Hz

120 Hz

Aspect Ratio

20:9

20:9

19.5:9

Pixel Density

424 ppi

402 ppi

460 ppi

Screen to Body Ratio (calculated)

85.92 %

87.6 %

90.49 %

Screen Protection

Corning Gorilla Glass, Glass Victus

Corning Gorilla Glass v5

Corning Gorilla Glass, Glass 7i

Bezel-less Display

with punch-hole display

with punch-hole display

with punch-hole display

HDR 10 / HDR+ Support

, HDR 10+

, HDR 10+

, HDR 10+

Design
Size Compare
Size Compare
Size Compare
Dimensions

Height: 151.7 mm
Width: 71.2 mm
Thickness: 7.9 mm

Height: 160 mm
Width: 73.9 mm
Thickness: 8.1 mm

Height: 150.8 mm
Width: 71.7 mm
Thickness: 8.2 mm

Weight

169 grams

183 grams

185 grams

Build Material

Back: Plastic

Back: Gorilla Glass

Water Resistance

, Water resistant, IP68, (up to 30 minutes in a depth of 1.5 meter)

, Splash proof, IP65

Ruggedness

Dust proof

Dust proof

Camera
Main Camera
Resolution

12 MP Primary Camera,f/1.8, Wide Angle(26 mm focal length, 1/1.7" sensor size, 1.8µm pixel size)64 MP f/2.0, Telephoto Camera(28 mm focal length, 1/1.7" sensor size, 0.8µm pixel size)12 MP f/2.2, Ultra-Wide Angle Camera(13 mm focal length, 1/2.55" sensor size, 1.4µm pixel size)

48 MP Primary Camera,f/1.8, Wide Angle(23 mm focal length, 1/1.4" sensor size, IMX689, Exmor-RS CMOS Sensor, UltraPixel BSI image sensor, 1.12µm pixel size)50 MP f/2.2, Ultra-Wide Angle Camera(14 mm focal length, 1/1.56" sensor size, 1µm pixel size)2 MP f/2.4, Mono Camera

50 MP Primary Camera,f/1.8, Wide Angle (84° field-of-view)(24 mm focal length, 1/1.56" sensor size, LYT 700, 1µm pixel size)50 MP f/2.0, Telephoto Camera(1/2.75" sensor size, 0.64µm pixel size)

Autofocus

, Phase Detection autofocus, Dual Pixel autofocus

, Phase Detection autofocus, Continuous autofocus

OIS

Flash

, LED Flash

, Dual LED Flash

, LED Flash

Image Resolution

4000 x 3000 Pixels

8000 x 6000 Pixels

8150 x 6150 Pixels

Settings

Exposure compensation, ISO control

Exposure compensation, ISO control

Exposure compensation, ISO control

Shooting Modes

Continuous Shooting
High Dynamic Range mode (HDR)

Continuous Shooting
High Dynamic Range mode (HDR)

Continuous Shooting
High Dynamic Range mode (HDR)

Camera Features

Digital Zoom
Auto Flash
Face detection
Touch to focus

Digital Zoom
Auto Flash
Face detection
Filters
Touch to focus

Digital Zoom
Auto Flash
Face detection
Touch to focus

Video Recording

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

7680x4320 @ 30 fps
3840x2160 @ 60 fps
1920x1080 @ 240 fps
1280x720 @ 480 fps

3840x2160 @ 60 fps
1920x1080 @ 240 fps
1280x720 @ 480 fps

Video Recording Features

Slow Motion
Bokeh portrait video
Video Pro Mode
Stereo recording

Super Stable
Video HDR
Bokeh portrait video

Dual Video Recording
Slow Motion
Video HDR
Bokeh portrait video

Front Camera
Excellent
Very Good
Best in Class
Resolution

10 MP f/2.2, Wide Angle, Primary Camera(26 mm focal length, 1/3.2" sensor size, 1.22µm pixel size)

16 MP f/2.4, Wide Angle, Primary Camera(1/3" sensor size, Exmor RS, 1µm pixel size)

32 MP f/2.0, Wide Angle, Primary Camera(21 mm focal length, 1/3.1" sensor size, 0.7µm pixel size)

Autofocus

, Phase Detection autofocus

Flash

, Screen flash

, Screen flash

Camera Features

Fixed Focus

Video Recording

3840x2160 @ 30 fps

1920x1080 @ 30 fps

3840x2160 @ 30 fps
1920x1080 @ 30 fps

Battery
Excellent
Very Good
Best in Class
Capacity

4000 mAh

4500 mAh

5850 mAh

Battery Type

Li-ion

Li-ion

TalkTime

Up to 33 Hours(4G)

Quick Charging

, 25W Fast Charging

, 65W Warp Charging, 100% in 29 minutes

, 80W Super VOOC Charging, 50% in 20 minutes

Wireless Charging

Wireless Reverse Charging

Storage
Internal Storage

128 GB / 256 GB

128 GB / 256 GB

256 GB / 512 GB

Storage Type

UFS 3.1

UFS 3.1

UFS 4.0

External Storage

No

No

No

Network & Connectivity
SIM Slot(s)

Dual SIM

Dual SIM

Dual SIM

SIM Type

SIM1: Nano, SIM2: Nano

SIM1: Nano, SIM2: Nano

SIM1: Nano, SIM2: Nano

Network Support

5G, 4G

5G, 4G

5G, 4G

VoLTE

SIM 1

5G Bands:
FDD N1 / N3 / N5 / N7 / N8 / N20 / N28
TDD N38 / N40 / N41 / N66 / N77 / N78
4G Bands:
TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 1900(band 39)
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) / 850(band 18) / 850(band 19) / 800(band 20) / 1900(band 25) / 850(band 26)
Read More..

5G Bands:
TDD N41 / N78
4G Bands:
TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 2100(band 34) / 1900(band 39)
FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 17) / 850(band 18) / 850(band 19) / 800(band 20) / 850(band 26)
Read More..

5G Bands:
FDD N1 / N3 / N5 / N8 / N26 / N28
TDD N38 / N40 / N41 / N48 / N66 / N77 / N78
4G Bands:
TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 2100(band 34) / 1900(band 39) / 3500(band 42) / 3500(band 48)
FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 700(band 28) / 1700(band 4) / 850(band 5) / 1700(band 66) / 850(band 18) / 850(band 19) / 850(band 26)
Read More..

SIM 2

4G Bands:
TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 1900(band 39)
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) / 850(band 18) / 850(band 19) / 800(band 20) / 1900(band 25) / 850(band 26)
Read More..

4G Bands:
TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 2100(band 34) / 1900(band 39)
FD-LTE 2100(band 1) / 1800(band 3) / 2600(band 7) / 900(band 8) / 1900(band 2) / 1700(band 4) / 850(band 5) / 700(band 17) / 850(band 18) / 850(band 19) / 800(band 20) / 850(band 26)
Read More..

5G Bands:
FDD N1 / N3 / N5 / N8 / N26 / N28
TDD N38 / N40 / N41 / N48 / N66 / N77 / N78
4G Bands:
TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 2100(band 34) / 1900(band 39) / 3500(band 42) / 3500(band 48)
FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 700(band 28) / 1700(band 4) / 1700(band 66) / 850(band 5) / 850(band 18) / 850(band 19) / 850(band 26)
Read More..

SAR Value

Head: 0.74 W/kg, Body: 1.08 W/kg

Head: 1.19 W/kg, Body: 0.78 W/kg

Head: 1.149 W/kg, Body: 0.601 W/kg

Wi-Fi

, Wi-Fi 6 (802.11 a/b/g/n/ac/ax) 5GHz, MIMO

, Wi-Fi 6 (802.11 a/b/g/n/ac/ax), MIMO

, Wi-Fi 7 (802.11 a/b/g/n/ac/be/ax) 5GHz, MIMO

Wi-Fi Features

Wi-Fi Direct, Mobile Hotspot

Mobile Hotspot

Mobile Hotspot

Bluetooth

, v5.0

, v5.2

, v6.0

GPS

with A-GPS, Glonass

with A-GPS, Glonass

with A-GPS, Glonass

NFC

Multimedia
Stereo Speakers

Audio Jack

USB Type-C

USB Type-C

USB Type-C

Audio Features

Dolby Atmos

Sensors
Fingerprint Sensor

Fingerprint Sensor Position

On-screen

On-screen

On-screen

Fingerprint Sensor Type

Ultrasonic

Optical

Optical

Other Sensors

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

Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope

Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope

Price List

Not Available
Rs. 27,999
Buy Now
Not Available

Not Available
Not Available
Rs. 54,999
Buy Now

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