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Samsung Galaxy M31 vs Samsung Galaxy M21s

Samsung Galaxy M31 SamsungGalaxy M31
VS
Samsung Galaxy M21s SamsungGalaxy M21s

The third device is shown on desktop screens only

General

Device Type
Smart Phone
Smart Phone
Device Name
SM-M315FSM-M315F/DSSM-M315F/DSN
—
Announced
February 2020
November 2020
Released
March 2020
November 2020
Colors
Space BlackOcean BlueRed
BlackBlue

Design

Length
159.2 mm (6.27 in)
159.2 mm (6.27 in)
Width
75.1 mm (2.96 in)
75.1 mm (2.96 in)
Thickness
8.9 mm (0.35 in)
8.9 mm (0.35 in)
Weight
191 g (6.74 oz)
191 g (6.74 oz)
Materials
Glass front (Gorilla Glass 3)Plastic backPlastic frame
Same on both

Network

2G Network
Yes
Yes
3G Network
Yes
Yes
4G Network
Yes
Yes
GPRS
Yes
Yes
EDGE
Yes
Yes
SIM
Nano SIM
Nano SIM
Multi SIM
Single SIM or Dual SIM
Dual SIM
Speed
3G Up to 42 MB4G Up to 600 MB
Same on both

Display

Display Type
Super AMOLED
Super AMOLED
Size
6.4 Inches
6.4 Inches
Resolution
1080x2340 Pixels (FHD+)
1080x2340 Pixels (FHD+)
Screen Ratio
84.1%
84.1%
Aspect Ratio
19.5:9
19.5:9
Pixel Density
403 PPI
403 PPI
Brightness Level
420 Nits
420 Nits
Display Protection
Corning Gorilla Glass 3
Corning Gorilla Glass 3
Features
Always-on DisplayWater Drop NotchDark ModeCapacitiveMulti-touch16M Colors
Same on both

Hardware

Chipset
Samsung Exynos 9611
Samsung Exynos 9611
Manufacturing Technology
10 nm
10 nm
CPU Type
Octa-core
Octa-core
CPU
Octa-core:Quad-core 2.3 GHzQuad-core 1.7 GHz
Same on both
GPU
Mali-G72 MP3
Mali-G72 MP3
RAM (Memory)
6/8 GB6 GB (64 GB)6 GB (128 GB)8 GB (128 GB)
4/6 GB4 GB (64 GB)6 GB (128 GB)
Internal Storage
64/128 GB
64/128 GB
Storage Type
UFS 2.1
UFS 2.1
Ram Type
LPDDR4x
LPDDR4x
Card Slot
Yes - MicroSD
Yes - MicroSD

Software

OS
Android 10
Android 10
Update To
Android 11
—
User Interface
One UI 3.0
One UI 2.5

Main camera

Triple
—
First Camera: 64 MP (Standard)Second Camera: 8 MP (Ultrawide)Third Camera: 5 MP (Depth)
Four
First Camera: 64 MP (Standard)Second Camera: 8 MP (Ultrawide)Third Camera: 5 MP (Macro)Fourth Camera: 5 MP (Depth)
—
Aperture Size
Fourth Camera: F/2.4
No extras
On both: First Camera: F/1.8, Second Camera: F/2.2, Third Camera: F/2.4
Video
4K 2160P@30fpsFHD 1080P@30fpsSlow MotionElectronic Stabilization (EIS)
Same on both
Flash
Yes
Yes
More details (1)Camera Features
Camera Features
Autofocus (AF)Portrait ModePro ModeDigital ZoomContinuous shootingPanoramaExposure compensationFace detectionGeotaggingHDRISO settingsScene modeSelf-timerTouch focusWhite balance settings
Same on both

Selfie Camera

Camera
32 MP
32 MP
Aperture Size
F/2.0
F/2.0
Video
4K 2160P@30fpsFHD 1080P@30fps
FHD 1080P@30fps
Flash
No
No
More details (1)Camera Features
Camera Features
Face DetectionPortrait ModeBeauty ModeGesture ShotHDR
Same on both

Connectivity

Wi-Fi
Wi-Fi 802.11a/b/g/n/acDual-bandWi-Fi DirectHotspot
Same on both
Bluetooth
5.0A2DPLE
Same on both
Location
GPSA-GPSGLONASSGALILEOBDS
Same on both
NFC
Yes (Market/region dependent)
—
USB
USB Type-C 2.0
USB Type-C 2.0

Media

Loudspeaker
Yes
Yes
3.5mm jack
Yes
Yes
FM Radio
Yes - RDS & Recording
Yes - RDS & Recording

Other specifications

Sensors
AccelerometerGyroscopeProximityCompass
Same on both
Lock Type
Fingerprint (Rear-mounted)Facial RecognitionPatternPINPassword
Same on both
Box Contents
DeviceUSB CablePower Adapter (15 W)HeadphonesSIM Eject ToolQuick start guide
Same on both

Charging and Battery

Fast Charging
15 W
15 W
Capacity
6000 mAh
6000 mAh

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Copyright © 2026 NXT Test. All Rights Reserved