Samsung Galaxy A51 vs Samsung Galaxy M31 vs Redmi K20 Pro
Key Feature Comparison
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At a Glance
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Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)
Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)
Octa core (2.84 GHz, Single core, Kryo 485 + 2.42 GHz, Tri core, Kryo 485 + 1.8 GHz, Quad core, Kryo 485)
4000 mAh
6000 mAh
4000 mAh
6.5 inches
6.4 inches
6.39 inches
Quad, 48MP + 12MP + 5MP + 5MP
Quad, 64MP + 8MP + 5MP + 5MP
Triple, 48MP + 13MP + 8MP
4G
4G
4G
Detailed Specs
Screen Size
6.5 inches
6.4 inches
6.39 inches
Screen Type
Super AMOLED
Super AMOLED
AMOLED
Screen Resolution
1080 x 2400 pixels
1080 x 2340 pixels
1080 x 2340 pixels
Pixel Density
405 ppi
403 ppi
403 ppi
Aspect Ratio
20:09
19.5:9
19.5:9
Screen Protection
Gorilla Glass 3
Gorilla Glass 3
Gorilla Glass 5
Screen to Body Ratio
87.44%
83.92%
91.90%
Screen Design
Punch hole
Regular notch
Bezel-less
Screen Quality
FHD
FHD
FHD
Phone Variants
8GB 128GB, 6GB 128GB
6GB 64GB, 8GB 128GB, 6GB 128GB
8GB 256GB, 6GB 128GB
Expandable Storage
Yes
Yes
No
RAM Type
LPDDR4X
LPDDR4X
LPDDR4X
Storage Type
UFS 2.0
UFS 2.1
UFS 2.1
Expandable Storage Capacity
Yes, 512 GB
Yes, 512 GB
-
OTG Support
Yes
Yes
Yes
Sensors
Light sensor, Proximity sensor, Accelerometer, Gyroscope
Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope
Light sensor, Proximity sensor, Accelerometer, Compass, Gyroscope
Operating System
Android v10 (Q)
Android v10 (Q)
Android v9.0 (Pie)
GPU
Mali-G72 MP3
Mali-G72 MP3
Adreno 640
Chipset
Samsung Exynos 9 Octa 9611
Samsung Exynos 9 Octa 9611
Qualcomm Snapdragon 855
CPU
Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)
Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)
Octa core (2.84 GHz, Single core, Kryo 485 + 2.42 GHz, Tri core, Kryo 485 + 1.8 GHz, Quad core, Kryo 485)
Custom User Interface
Samsung One UI
Samsung One UI
MIUI
Clock Speed
2.3 GHz
2.3 GHz
2.84 GHz
Architecture
64 bit
64 bit
64 bit
Process Technology
10 nm
10 nm
7 nm
Battery Capacity
4000 mAh
6000 mAh
4000 mAh
Battery Removable
No
No
No
Battery Type
Li-ion
Li-ion
Li-Polymer
Charger Type
Fast, 15W
Fast, 15W
Quick, v4.0
USB Type-C
Yes
Yes
Yes
Fast Charging
Yes
Yes
Yes
Announced On
5-Dec-19
25-Feb-20
28-May-19
Market Status
Available
Available
Available
Brand
Samsung
Samsung
Xiaomi
Model Number
SM-A515FZB1INS/SM-A515FZBWINS
SM-M315FZKDINS
MZB7750IN
Price Status
Confirmed
Confirmed
Confirmed
Price
Rs. 20,450
Rs. 15,999
Rs. 24,999
GPS
Yes A-GPS, Glonass
Yes A-GPS, Glonass
Yes A-GPS, Glonass
Audio Features
Dolby Atmos
Dolby Atmos
24-bit/192kHz audioActive noise cancellation with dedicated mic
NFC
Yes
No
No
Network Support
4G
4G
4G
Bluetooth
Yes
Yes
Yes
3.5mm Audio Jack
Yes
Yes
Yes
SIM Size
SIM1: Nano, SIM2: Nano
SIM1: Nano, SIM2: Nano
SIM1: Nano, SIM2: Nano
Wi-Fi
Yes, Wi-Fi 802.11, ac/b/g/n/n 5GHz
Yes, Wi-Fi 802.11, ac/b/g/n/n 5GHz
Yes, Wi-Fi 802.11, a/ac/b/g/n
Bluetooth Type
v5.0
v5.0
v5.0
Audio Jack
3.5 mm
3.5 mm
3.5 mm
SIM Slot(s)
Dual SIM, GSM+GSM
Dual SIM, GSM+GSM, Dual VoLTE
Dual SIM, GSM+GSM, Dual VoLTE
eSIM
No
No
No
Wi-Fi Features
Wi-Fi Direct, Mobile Hotspot
Wi-Fi Direct, Mobile Hotspot
Wi-Fi Direct, Mobile Hotspot
VoLTE
Yes
Yes
Yes
SIM 1 Bands
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...
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...
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), 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz, 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz, GPRS: Available, EDG...
SIM 2 Bands
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...
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...
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), 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz, 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz, GPRS: Available, EDG...
FM Radio
-
Yes
Yes
Front Video Recording
1920x1080 @ 30 fps
1920x1080 @ 30 fps
1920x1080 @ 30 fps, 1280x720 @ 30 fps
Front Camera Features
HDR
HDR
HDR
Front Camera Setup
Single, 32MP
Single, 32MP
Single, 20MP
Front Camera 1 Resolution
32 MP
32 MP
20 MP
Front Camera 1 Type
f/2.2 Primary Camera
f/2.0 Primary Camera
f/2.2 Primary Camera
Front Camera 1 Lens
2.8" sensor size, 0.8 micrometre pixel size
26 mm focal length, 2.8" sensor size, 0.8 micrometre pixel size
0.8 micrometre pixel size
Front Aperture
f/2.2
f/2.0
f/2.2
Front Flash
No
No
-
Front Sensor
-
Exmor RS
-
Weight
172 grams
191 grams
191 grams
Colors
Prism Crush White, Prism Crush Black, Prism Crush Pink, Prism Crush Blue
Black, Blue
Flame Red, Glacier Blue, Carbon Fiber Black, Pearl White
Build
Back: Plastic
Back: Plastic
Back: Gorilla Glass
Dimensions
158.5 x 73.6 x 7.9 mm
159.2 x 75.1 x 8.9 mm
156.7 x 74.3 x 8.8 mm
SAR Value
Head: 0.598 W/kg
Head: 0.383 W/kg
Head: 1.03 W/kg, Body: 0.72 W/kg
OIS
No
No
No
Rear Flash
Yes, LED Flash
Yes, LED Flash
Yes, Dual LED Flash
Rear Video Recording
3840x2160 @ 30 fps
3840x2160 @ 30 fps, 1920x1080 @ 30 fps, 1280x720 @ 240 fps
3840x2160 @ 30 fps, 1920x1080 @ 60 fps, 1280x720 @ 120 fps
Rear Camera Features
8 x Digital Zoom, Auto Flash, Face detection, Touch to focus
8 x Digital Zoom, Auto Flash, Face detection, Touch to focus
Auto Flash, Face detection, Touch to focus
Rear Camera Setup
Quad, 48MP + 12MP + 5MP + 5MP
Quad, 64MP + 8MP + 5MP + 5MP
Triple, 48MP + 13MP + 8MP
Rear Camera 1 Resolution
48 MP
64 MP
48 MP
Rear Camera 1 Type
f/2.0 (upto 8x Digital Zoom) Primary Camera
f/1.8 (upto 8x Digital Zoom) Primary Camera
f/1.75, Wide Angle Primary Camera
Rear Camera 1 Lens
26 mm focal length, 2.25" sensor size, 0.8 micrometre pixel size
26 mm focal length, 1.7" sensor size, 0.8 micrometre pixel size
2" sensor size, 0.8 micrometre pixel size
Rear Camera 2 Resolution
12 MP
8 MP
13 MP
Rear Camera 2 Type
f/2.2, Wide Angle, Ultra-Wide Angle Camera
f/2.2, Wide Angle, Ultra-Wide Angle Camera
f/2.4, Wide Angle, Ultra-Wide Angle Camera
Rear Camera 3 Resolution
5 MP
5 MP
8 MP
Rear Camera 3 Type
f/2.4, Macro Camera
f/2.4, Macro Camera
f/2.4 Telephoto (upto 10x Digital Zoom, upto 2x Optical Zoom) Camera
Rear Camera 4 Resolution
5 MP
5 MP
-
Rear Camera 4 Type
f/2.2, Depth Camera
f/2.2, Depth Camera
-
Rear Sensor
ISO-CELL
ISOCELL Plus
Exmor-RS CMOS Sensor
Rear Aperture
f/2.0
f/1.8
f/1.75
Rear Camera 2 Lens
-
12 mm focal length, 4.0" sensor size, 1.12 micrometre pixel size
3" sensor size, 1.12 micrometre pixel size
Rear Camera 3 Lens
-
25 mm focal length, 5.0" sensor size, 1.12 micrometre pixel size
4.0" sensor size, 1.12 micrometre pixel size
Fingerprint Scanner
Yes
Yes
Yes
Fingerprint Scanner Position
On-Screen
Rear
On-Screen
Fingerprint Scanner Type
Optical
-
Optical
Face Unlock
Yes
Yes
Yes