Samsung Galaxy M31 128GB vs Samsung Galaxy M21 128GB

Comparing the Samsung Galaxy M31 128GB vs Samsung Galaxy M21 128GB across performance, display, camera, battery, storage, expert reviews and user rating to help determine the better smartphone.

Here is the summary of the results:

Performance: Samsung Galaxy M31 128GB scores higher on the Geekbench Multi-Core test with 1,284, while Samsung Galaxy M21 128GB scores 1,100, making Samsung Galaxy M31 128GB the better performer.

Display: Both Samsung Galaxy M31 128GB and Samsung Galaxy M21 128GB offer the same screen size of 6.4 inches and feature the same Super AMOLED display.

Rear Camera: Samsung Galaxy M31 128GB offers a higher rear camera resolution with 64 MP, while Samsung Galaxy M21 128GB offers 48 MP, making Samsung Galaxy M31 128GB better for rear camera photography.

Front Camera: Samsung Galaxy M31 128GB offers a higher front camera resolution with 32 MP, while Samsung Galaxy M21 128GB offers 20 MP, making Samsung Galaxy M31 128GB better for front camera photography.

Battery: Samsung Galaxy M31 128GB delivers longer battery life with 15h 43m, while Samsung Galaxy M21 128GB delivers 10h 20m, making Samsung Galaxy M31 128GB the better pick for all day usage.

Storage: Both Samsung Galaxy M31 128GB and Samsung Galaxy M21 128GB offer the same internal storage of 128 GB.

Expert Review: The editorial team rates both Samsung Galaxy M31 128GB and Samsung Galaxy M21 128GB equally at 7.

User Rating: Samsung Galaxy M31 128GB and Samsung Galaxy M21 128GB both receive the same user rating of 4.2.

Samsung Galaxy M31 128GB

₹18,665

(Out of Stock)

Samsung Galaxy M21 128GB

₹16,499

(Out of Stock)

Summary

Spec Score

78%

76%

80%

Release Date

06 Apr, 2020

23 Mar, 2020

19 Oct, 2026

Performance


Samsung Exynos 9 Octa 9611	Samsung Exynos 9 Octa 9611	Samsung Exynos 1330
Octa Core (upto 2.3 GHz)	Octa Core (upto 2.3 GHz)	Octa Core (upto 2.4 GHz)
6 GB RAM	6 GB RAM	4 GB/ 6 GB/ 8 GB/ RAM

Display


6.4 inches (16.26 cm)	6.4 inches (16.26 cm)	6.7 inches (17.02 cm)
Super AMOLED	Super AMOLED	Super AMOLED
1080x2340 px (FHD+)	1080x2340 px (FHD+)	1080x2340 px (FHD+)
N/A	N/A	90 Hz Refresh Rate

Rear Camera


64 MP Primary Camera	48 MP Primary Camera	50 MP Wide Angle Primary Camera
8 MP Ultra-Wide Angle Camera	8 MP Ultra-Wide Angle Camera	5 MP Ultra-Wide Angle Camera
5 MP Macro Camera	5 MP Depth Camera	2 MP Macro Camera
5 MP Depth Camera	N/A	N/A

Front Camera


32 MP	20 MP	13 MP Wide Angle Lens

Battery


6000 mAh	6000 mAh	5000 mAh
15W Fast Charging	15W Fast Charging	25W Fast Charging
No Wireless Charging	No Wireless Charging	No Wireless Charging

Storage

128 GB	128 GB	128 GB
UFS 2.1	UFS 2.1	UFS 2.2

Expert Review

7.0/10

Read Expert Review

7.0/10

Read Expert Review

N/A

Pros

Terrific battery life
Attractive AMOLED display
Smooth software experience

Vivid and colour accurate display
Long-lasting battery
Decent day-time photography

Device yet to be reviewed

Cons

Poor low light camera performance
Processor could be better
Uninspiring design

Higher refresh rate would have been nice
Dated waterdrop notch design
Slow charging speed

Device yet to be reviewed

User Ratings

4.2/5

(313,183 ratings)

4.2/5

(182,575 ratings)

N/A

Benchmarks (The higher, the better)

194,497 AnTuTu Score	168,633 AnTuTu Score	N/A
15h 43m Battery Life (PC Mark)	10h 20m Battery Life (PC Mark)	N/A

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Video

11 More Videos

There are no videos available for the device.

User Feedback

General

Launch Date

Apr 06, 2020

(Official)

Mar 23, 2020

(Official)

Oct 18, 2026

(Official)

Operating System

Android v10 (Q)

Android v15

OS Updates

N/A

5 Year

Security Updates

N/A

5 Year

Custom UI

Samsung One UI

Performance

Performance Rating

Good

Chipset

Samsung Exynos 9 Octa 9611

Samsung Exynos 1330

View Details

Processor

Octa core

2.3 GHz, Quad core, Cortex A73 1.7 GHz, Quad core, Cortex A53

Octa core

2.4 GHz, Dual core, Cortex A78 2 GHz, Hexa Core, Cortex A55

Architecture (The higher, the better)

64 bit

Fabrication (The lower, the better)

10 nm

5 nm

Graphics (GPU)

Mali-G72 MP3

Mali-G68 MP2

RAM

6 GB / 8 GB

4 GB / 6 GB

4 GB

RAM Type

LPDDR4X

Performance Test Results

AnTuTu Score (The higher, the better) AnTuTu benchmark measures overall performance of a phone by stress-testing CPU, GPU, RAM, etc.

194,497

168,633

N/A

Bootup Time (The lower, the better)

26.0 s

23.0 s

N/A

Gaming Test Results

Battery Drain* (The lower, the better)

6.0 %

3.0 %

N/A

Heating* (The lower, the better)

48.3 %

11.3 %

N/A

* after 30 mins of gaming

Display

Display Rating

Best In Class

Excellent

Display Type

Super AMOLED

Screen Size

6.4 inches (16.26 cm)

6.7 inches (17.02 cm)

Resolution

1080x2340 px (FHD+)

Brightness

N/A

420 nits

N/A

Peak Brightness

N/A

1100 nits

HBM Brightness

N/A

800 nits

Refresh Rate

N/A

90 Hz

Aspect Ratio

19.5:9

Pixel Density

403 ppi

387 ppi

Screen to Body Ratio (calculated)

83.92 %

84.02 %

85.86 %

Screen Protection

Corning Gorilla

Corning Gorilla Glass Victus

Bezel-less Display

Yes with notch

Yes with waterdrop notch

Yes with notch

Screen to Body Ratio (claimed by the brand)

N/A

91 %

84.70 %

Design

Height

159.2 mm

159 mm

164.4 mm

Width

75.1 mm

77.9 mm

Thickness

8.9 mm

7.5 mm

Weight

191 grams

188 grams

192 grams

Build Material

Back: Plastic

Back: Glass Fiber

Water Resistance

N/A

Yes Splash proof IP54

Ruggedness

N/A

Dust proof

Rear Camera

Rear Camera Rating

Very Good

Resolution

64 MP
Primary Camera8x Digital Zoomf/1.826 mm focal length 1/1.7" sensor size S5KGW1 ISOCELL Plus 0.8µm pixel size

48 MP
Primary Camera4x Digital Zoomf/2.026 mm focal length 1/2" sensor size CMOS image sensor 0.8µm pixel size

50 MP
Primary Camera10x Digital Zoomf/1.8 Wide Angle1/2.76" sensor size S5KJN1 0.64µm pixel size

8 MP
f/2.2 Ultra-Wide Angle Camera12 mm focal length 1/4.0" sensor size 1.12µm pixel size

5 MP
f/2.2 Ultra-Wide Angle Camera1/5.0" sensor size 1.12µm pixel size

5 MP
f/2.4 Macro Camera25 mm focal length 1/5.0" sensor size 1.12µm pixel size

5 MP
f/2.2 Depth Camera

2 MP
f/2.4 Macro Camera1/5.0" sensor size 1.75µm pixel size

5 MP
f/2.2 Depth Camera

N/A

Autofocus

Yes Phase Detection Autofocus

Yes

OIS

Yes

Flash

Yes LED Flash

Image Resolution

9000 x 7000 Pixels

8000 x 6000 Pixels

8160 x 6120 Pixels

Settings

Exposure compensation ISO control

Shooting Modes

Continuous Shooting
High Dynamic Range mode (HDR)

Continuous Shooting
High Dynamic Range mode (HDR)
Macro Mode

Camera Features

8 x Digital Zoom
Auto Flash
Face detection
Touch to focus

4 x Digital Zoom
Auto Flash
Face detection
Touch to focus

10 x Digital Zoom
Auto Flash
Face detection
Touch to focus

Video Recording

4k @30 fps
Full HD @30 fps
HD @240 fps

4k @30 fps
Full HD @30 fps

Full HD @30 fps
HD @120 fps

Video Recording Features

N/A

Video Pro Mode

Front Camera

Front Camera Rating

Very Good

Resolution

32 MP
f/2.0 Primary Camera26 mm focal length 1/2.8" sensor size Exmor RS 0.8µm pixel size

20 MP
f/2.2 Primary Camera26 mm focal length CMOS

13 MP
f/2.0 Wide Angle Primary Camera1/3.1" sensor size 1.12µm pixel size

Autofocus

Flash

Camera Features

N/A

Fixed Focus

Video Recording

Full HD @30 fps

Battery

Battery Rating

Very Good

Capacity

6000 mAh

5000 mAh

Battery Type

Li-ion

TalkTime

Up to 48 Hours(4G)

N/A

Quick Charging

Yes 15W Fast Charging

Yes 25W Fast Charging

Battery Test Results

Battery Life (PC Mark) (The higher, the better) PCMark Battery benchmark measures battery life of a phone with various activities such as web browsing, photo editing, writing, video editing, etc.

15h 43m

10h 20m

N/A

Charging Time (20% to 100%) (The lower, the better)

2h 1m 8s

2h 9m 47s

N/A

Storage

Internal Storage

64 GB / 128 GB

128 GB

Storage Type

UFS 2.1

UFS 2.2

Expandable Storage

Yes Up to 512 GB

Yes Up to 2 TB

Network & Connectivity

SIM Slot(s)

Dual SIM

SIM Type

SIM1: Nano SIM2: Nano

SIM1: Nano SIM2: Nano (Hybrid)

Network Support

5G Not Supported 4G

5G 4G

VoLTE

Yes

SIM 1

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)

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) / 850(band 5) / 800(band 20)

5G Bands:

FDD N1 / N3 / N5 / N7 / N8 / N20 / N26 / N28 / N66
TDD N38 / N40 / N41 / N66 / N77 / N78

N/A

4G Bands:

TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41)
FD-LTE 1700(band 66) / 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 17) / 800(band 20) / 850(band 26) / 700 (band 12)

SIM 2

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) / 850(band 5) / 800(band 20)

5G Bands:

FDD N1 / N3 / N5 / N7 / N8 / N20 / N26 / N28 / N66
TDD N38 / N40 / N41 / N66 / N77 / N78

N/A

4G Bands:

SAR Value

Head: 0.383 W/kg

Head: 0.468 W/kg

Head: 0.640 W/kg

Wi-Fi

Yes Wi-Fi 5 (802.11 b/g/n/ac) 5GHz

Yes Wi-Fi 5 (802.11 a/b/g/n/ac) 5GHz MIMO

Wi-Fi Features

Wi-Fi Direct Mobile Hotspot

Bluetooth

Yes v5.0

Yes v5.3

GPS

Yes with A-GPS Glonass

NFC

Yes

Multimedia

Audio Jack

3.5 mm

USB Type-C

Audio Features

Dolby Atmos

N/A

Sensors

Fingerprint Sensor

Yes

Fingerprint Sensor Position

Rear

Side

Fingerprint Sensor Type

N/A

Capacitive

Other Sensors

Light sensor Proximity sensor Accelerometer Compass Gyroscope

Light sensor Proximity sensor Accelerometer Gyroscope

Light sensor Proximity sensor Accelerometer Compass Gyroscope

Compare Prices

Not Available in any store

₹17,999

@ Flipkart