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Samsung Galaxy A51 vs Xiaomi Redmi Note 9 Pro Max vs Poco X2

Key Feature Comparison

6.9

Samsung Galaxy A51

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7

Xiaomi Redmi Note 9 Pro Max

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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)

Samsung Exynos 9 Octa 9611, Mali-G72 MP3

Octa core (2.3 GHz, Dual core, Kryo 465 + 1.8 GHz, Hexa Core, Kryo 465)

Qualcomm Snapdragon 720G, Adreno 618

Octa core (2.2 GHz, Dual core, Kryo 470 + 1.8 GHz, Hexa Core, Kryo 470)

Qualcomm Snapdragon 730G, Adreno 618

4000 mAh

Li-ion, Fast, 15W

5020 mAh

Li-Polymer, Fast, 33W

4500 mAh

Li-Polymer, Fast, 27W

6.5 inches

405 ppi, FHD

6.67 inches

395 ppi, FHD

6.67 inches

395 ppi, FHD

Quad, 48MP + 12MP + 5MP + 5MP

3840x2160 @ 30 fps

Quad, 64MP + 8MP + 5MP + 2MP

3840x2160 @ 30 fps, 1920x1080 @ 60 fps, 1280x720 @ 960 fps

Quad, 64MP + 8MP + 2MP + 2MP

3840x2160 @ 30 fps, 1920x1080 @ 60 fps, 1280x720 @ 960 fps

4G

Dual SIM, GSM+GSM

4G

Dual SIM, GSM+GSM

4G

Dual SIM, GSM+GSM, Dual VoLTE

Detailed Specs

Screen Size

6.5 inches
6.67 inches
6.67 inches

Screen Type

Super AMOLED
IPS LCD
IPS LCD

Screen Resolution

1080 x 2400 pixels
1080 x 2400 pixels
1080 x 2400 pixels

Pixel Density

405 ppi
395 ppi
395 ppi

Aspect Ratio

20:09
20:09
20:09

Screen Protection

Gorilla Glass 3
Gorilla Glass 5
Gorilla Glass 5

Screen to Body Ratio

87.44%
84.73%
91%

Screen Design

Punch hole
Punch hole
Punch hole

Screen Quality

FHD
FHD
FHD

Screen Refresh Rate

-
60 Hz
120 Hz

Peak Brightness

-
450 nits
500 nits

Phone Variants

8GB 128GB, 6GB 128GB
6GB 64GB, 8GB 128GB, 6GB 128GB
6GB 64GB, 8GB 256GB, 6GB 128GB

Expandable Storage

Yes
Yes
Yes

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
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 v10 (Q)

GPU

Mali-G72 MP3
Adreno 618
Adreno 618

Chipset

Samsung Exynos 9 Octa 9611
Qualcomm Snapdragon 720G
Qualcomm Snapdragon 730G

CPU

Octa core (2.3 GHz, Quad core, Cortex A73 + 1.7 GHz, Quad core, Cortex A53)
Octa core (2.3 GHz, Dual core, Kryo 465 + 1.8 GHz, Hexa Core, Kryo 465)
Octa core (2.2 GHz, Dual core, Kryo 470 + 1.8 GHz, Hexa Core, Kryo 470)

Custom User Interface

Samsung One UI
MIUI
MIUI

Clock Speed

2.3 GHz
2.3 GHz
2.2 GHz

Architecture

64 bit
64 bit
64 bit

Process Technology

10 nm
8 nm
8 nm

Battery Capacity

4000 mAh
5020 mAh
4500 mAh

Battery Removable

No
No
No

Battery Type

Li-ion
Li-Polymer
Li-Polymer

Charger Type

Fast, 15W
Fast, 33W
Fast, 27W

USB Type-C

Yes
Yes
Yes

Fast Charging

Yes
Yes
Yes

Charging Time

-
50 % in 30 minutes
-

Announced On

5-Dec-19
12-Mar-20
5-Feb-20

Market Status

Available
Available
Available

Brand

Samsung
Xiaomi
POCO

Model Number

SM-A515FZB1INS/SM-A515FZBWINS
M2003J6B1I/MZB9589IN
MZB8744IN

Price Status

Confirmed
Confirmed
Confirmed

Price

Rs. 20,450
Rs. 14,569
Rs. 14,999

GPS

Yes A-GPS, Glonass
Yes A-GPS, Glonass
Yes A-GPS, Glonass

Audio Features

Dolby Atmos
-
24-bit/192kHz audio

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 (Hybrid)

Wi-Fi

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

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 SIM, GSM+GSM, Dual VoLTE

eSIM

No
No
No

Wi-Fi Features

Wi-Fi Direct, Mobile Hotspot
Wi-Fi Direct, Mobile Hotspot
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 2300(band 40) / 2500(band 41), FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 850(band 5), 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz, 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz, GPRS: Available, EDGE: Available...
4G Bands: TD-LTE 2300(band 40) / 2500(band 41), FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 850(band 5), 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz, 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz, GPRS: Available, EDGE: Available...

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 2300(band 40) / 2500(band 41), FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 850(band 5), 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz, 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz, GPRS: Available, EDGE: Available...
4G Bands: TD-LTE 2300(band 40) / 2500(band 41), FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 850(band 5), 3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz, 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz, GPRS: Available, EDGE: Available...

Front Video Recording

1920x1080 @ 30 fps
1920x1080 @ 30 fps, 1280x720 @ 30 fps
1920x1080 @ 30 fps, 1280x720 @ 30 fps

Front Camera Features

HDR
HDR, panorama
HDR

Front Camera Setup

Single, 32MP
Single, 32MP
Dual, 20MP + 2MP

Front Camera 1 Resolution

32 MP
32 MP
20 MP

Front Camera 1 Type

f/2.2 Primary Camera
Primary Camera
f/2.2 Primary Camera

Front Camera 1 Lens

2.8" sensor size, 0.8 micrometre pixel size
1.6 micrometre pixel size
0.8 micrometre pixel size

Front Aperture

f/2.2
-
f/2.2

Front Flash

No
-
-

Weight

172 grams
209 grams
208 grams

Colors

Prism Crush White, Prism Crush Black, Prism Crush Pink, Prism Crush Blue
Aurora Blue , Glacier White, Interstellar Black , Champagne Gold
Atlantis Blue, Matrix Purple, Phoenix Red

Build

Back: Plastic
Back: Gorilla Glass
Back: Gorilla Glass

Dimensions

158.5 x 73.6 x 7.9 mm
165.5 x 76.6 x 8.8 mm
165.3 x 76.6 x 8.7 mm

SAR Value

Head: 0.598 W/kg
Head: 0.880 W/kg, Body: 0.475 W/kg
Head: 1.080 W/kg, Body: 0.620 W/kg

OIS

No
-
No

Rear Flash

Yes, LED Flash
Yes, LED Flash
Yes, LED Flash

Rear Video Recording

3840x2160 @ 30 fps
3840x2160 @ 30 fps, 1920x1080 @ 60 fps, 1280x720 @ 960 fps
3840x2160 @ 30 fps, 1920x1080 @ 60 fps, 1280x720 @ 960 fps

Rear Camera Features

8 x Digital Zoom, Auto Flash, Face detection, Touch to focus
10 x Digital Zoom, Auto Flash, Face detection, Touch to focus
Digital Zoom, Auto Flash, Face detection, Touch to focus

Rear Camera Setup

Quad, 48MP + 12MP + 5MP + 5MP
Quad, 64MP + 8MP + 5MP + 2MP
Quad, 64MP + 8MP + 2MP + 2MP

Rear Camera 1 Resolution

48 MP
64 MP
64 MP

Rear Camera 1 Type

f/2.0 (upto 8x Digital Zoom) Primary Camera
f/1.89 (upto 10x Digital Zoom) Primary Camera
f/1.89 Primary Camera

Rear Camera 1 Lens

26 mm focal length, 2.25" sensor size, 0.8 micrometre pixel size
1.7" sensor size, 1.6 micrometre pixel size
1.7" sensor size, 0.8 micrometre pixel size

Rear Camera 2 Resolution

12 MP
8 MP
8 MP

Rear Camera 2 Type

f/2.2, Wide Angle, Ultra-Wide Angle Camera
f/2.2, Wide Angle, Ultra-Wide Angle Camera
f/2.2, Wide Angle, Ultra-Wide Angle Camera

Rear Camera 3 Resolution

5 MP
5 MP
2 MP

Rear Camera 3 Type

f/2.4, Macro Camera
Macro Camera
f/2.4, Macro Camera

Rear Camera 4 Resolution

5 MP
2 MP
2 MP

Rear Camera 4 Type

f/2.2, Depth Camera
Depth Camera
f/2.4, Depth Camera

Rear Sensor

ISO-CELL
CMOS image sensor, ISOCELL Plus
Exmor-RS CMOS Sensor

Rear Aperture

f/2.0
f/1.89
f/1.89

Rear Camera 2 Lens

-
1.12 micrometre pixel size
1.12 micrometre pixel size

Rear Camera 3 Lens

-
1.12 micrometre pixel size
1.75 micrometre pixel size

Rear Camera 4 Lens

-
1.75 micrometre pixel size
1.75 micrometre pixel size

Fingerprint Scanner

Yes
Yes
Yes

Fingerprint Scanner Position

On-Screen
Side
Side

Fingerprint Scanner Type

Optical
-
-

Face Unlock

Yes
Yes
Yes

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