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General Information
Model Name
Galaxy M31s
Galaxy M51
Model type
Bar
Bar
Colors
Blue (Mirage Blue)Black (Mirage Black)
Black ()White ()
Announced
2020, July
2020, August
Released
2020, August
2020, September
Physical specifications
Dimensions
Bar: 159.3 x 74.4 x 9.3 mm
Bar: 163.9 x 76.3 x 9.5 mm
Weights
203g
213g
Operating system
Operating system
Android 10
Android 10
One UI version
2.5
2.1
Networks
SIM
Dual SIM model
Dual SIM model
SIM card sizes
Nano-SIM (4FF)
Nano-SIM (4FF)
Networks
2G3G4G
2G3G4G
eSIM support
No
No
Display
Kind
Main Display
Name
Infinity-O Display
Infinity-O Display
Technology
Super AMOLED Display
Super AMOLED Plus
Size
6.5 inch / 165.1 mm
6.7 inch / 170.18 mm
Resolution
FHD+ / 2400x1080 pixels
FHD+ / 2400x1080 pixels
Pixel density
405 PPI
Screen to body ratio
~91.0%
~%
Processors
Memory
RAM/ROM sizes
6 GB RAM with 128 GB ROM8 GB RAM with 128 GB ROM
6 GB RAM with 128 GB ROM8 GB RAM with 128 GB ROM
External memory support
Yes
Yes
External memory support maximum
512 GB
512 GB
Sensors
Accelerometer
Yes
Yes
Fingerprint sensor
Yes
Yes
Geomagnetic sensor
Yes
Yes
Gyro sensor
Yes
Yes
Hall sensor
No
Yes
Light Sensor
Yes
No
Proximity sensor
No
Yes
RGB Light sensor
No
Yes
Virtual Proximity Sensing
Yes
No
Video
Max. Video Recording Resolution
4K UHD video recording at 30 fps (3840x2160)
4K UHD video recording at 30 fps (3840x2160)
External memory support
Yes
Yes
External memory support maximum
512 GB
512 GB
Front Camera
Flash
No
No
Kind
Selfie Camera
Megapixels
32MP
32MP
Aperture
F2.0
F2.2
Pixel size
0.8µm
Rear Camera
Flash
Yes
Yes
Digital Zoom
Yes
Yes
Kind
Wide-angle Camera
Megapixels
64MP
64MP
Aperture
F1.8
F1.8
Pixel size
0.8µm
Field of view
81°
Extras
PDAF
Kind
Ultra Wide Camera
Megapixels
12MP
12MP
Aperture
F2.2
F2.2
Field of view
123˚
123˚
Kind
Macro Camera
Megapixels
5MP
5MP
Aperture
F2.4
F2.4
Kind
Depth Camera
Megapixels
5MP
5MP
Aperture
F2.4
F2.4
Connectivity
ANT+
No
Yes
USB version
Type C
Type C
3.5mm Headphonejack
Yes
Yes
Location technology
BeiDouGPSGlonassGalileo
GPSGalileoGlonassBeiDou
Wi-Fi
Yes
Yes
Wi-Fi Direct
Yes
Yes
NFC
Yes
Yes
Bluetooth Version
5.0
5.0
Battery
Standard battery capacity
6000mAh
7000mAh
Removable battery
No
No
Wired fast charging
Yes
Yes
Wired fast charging watt
25
25