Samsung Galaxy A51 vs Xiaomi Redmi 9A: Comparison

Comparison of features, performance, design, battery, camera and connectivity between the following smartphones: Samsung Galaxy A51 vs Xiaomi Redmi 9A. The complete information of specifications to decide which to buy.

Compare
Samsung Galaxy A51Samsung Galaxy A51Global · 4GB · 128GB · A515F
Xiaomi Redmi 9AXiaomi Redmi 9AGlobal · 2GB · 32GB
Technical data sheets

Basics
Samsung Galaxy A51
Samsung Galaxy A51
Global · 4GB · 128GB · A515F
View datasheet
vs
Xiaomi Redmi 9A
Xiaomi Redmi 9A
Global · 2GB · 32GB
View datasheet
vs

Score
Ki Cost-effective
Score		 7.1 Ki Cost-effective
Score 		6.1 Ki Cost-effective
Score
Design and Screen score 6.4Design & Materials 5.4Design & Materials
Performance and Hardware score 5.6Performance & Hardware 5.3Performance & Hardware
Camera score 6.9Camera 5.2Camera
Connectivity score 7.0 Connectivity 5.6 Connectivity
Battery score 5.3 Battery 6.0 Battery

User reviews
User score
7.3
121 reviews
4.9
154 reviews

Technical specifications of the Samsung Galaxy A51 vs Xiaomi Redmi 9A

Specs Samsung Galaxy A51 prices Samsung Galaxy A51
Global · 4GB · 128GB · A515F 		Xiaomi Redmi 9A prices Xiaomi Redmi 9A
Global · 2GB · 32GB
Inches 6.5" 6.53"
Resolution FHD+ HD+
Usable surface 88% useful 81% useful
Aspect Ratio 19.5:9 20:9
Dimensions 73.6 mm
158.5 mm
7.9 mm 		77.1 mm
164.9 mm
9.0 mm
Weight 172 g 194 g
Micro Exynos 9611
Octa-Core 		Helio G25
Octa-Core
RAM 4 GB RAM 2 GB RAM
Storage 128 GB 32 GB
AnTuTu 276.561
v10 		102.778
v9
Battery 4000 mAh 5000 mAh
Main Camera 1
48 Mpx · ƒ/2.0
IMX582 Exmor RS
2 3 4 		1
13 Mpx · ƒ/2.2

Selfie Camera SELF 32 Mpx · ƒ/2.2 SELF 5 Mpx · ƒ/2.2
Bands
OS Android 13 Tiramisu Android 11 Red Velvet Cake

Brand
Brand Samsung Xiaomi
Aliases SM-A515F M2006C3LG

Release Date
Release date December 2019,
6 years ago 		June 2020,
6 years ago
State On Sale On Sale
Market Global Global

Design & Materials

Structure

Samsung Galaxy A51
Xiaomi Redmi 9A
Samsung Galaxy A51
Xiaomi Redmi 9A
Size
73.6 mm • 158.5 mm • 7.9 mm
See more details
 Print 3D Model
77.1 mm • 164.9 mm • 9.0 mm
See more details
 Print 3D Model
Weight 172 g 194 g
Usable surface 88 % 81 %
Materials Plastic Plastic
Resistance - -
Colors
Black
White
Blue
Pink
Black
Blue
Green

Screen
Diagonal 6.5" 6.53"
Type Super AMOLED LCD IPS
Aspect Ratio 19.5:9 20:9
Resolution FHD+
1080 x 2340 px 		HD+
720 x 1600 px
Density 396 Pixels per inch 269 Pixels per inch

Others

Others
  • Hole-punch Notch
  • Scratch resistant
  • Capacitive
  • Multi-touch
  • Frameless
  • Water Drop Notch
  • Brightnes 400 cd/m² (typ)
  • 1500:1 contrast ratio
  • TÜV Rheinland Eye Comfort Certification
  • 70% NTSC
  • Scratch resistant
  • Capacitive
  • Multi-touch
  • Frameless

User reviews

Is it a drop-resistant and scratch-resistant smartphone?
6.7
7.2
Do you think it's a nice phone?
8.2
5.9
Is it comfortable?
8.3
6.0
Can you see it well in the sunlight?
7.5
4.9
Number of reviews
121 reviews
154 reviews

Performance & Hardware

Processor
Model Samsung Exynos 7 Octa 9611 Mediatek Helio G25
CPU 4x Cortex-A73 2.3 GHz + 4x Cortex-A53 1.67 GHz 8x Cortex-A53 2.0 GHz
Type Octa-Core Octa-Core
Manufacturing 10 nm 12 nm
64 Bits Yes Yes

Graphics
GPU ARM Mali-G72 MP3 IMG PowerVR GE8320 600MHz

RAM
RAM 4 GB 2 GB
Type LPDDR4X RAM LPDDR4X RAM

Antutu
Score
276.561
Antutu v10
Overall performance better than 61% of devices
See more details
102.778
Antutu v9
Overall performance better than 52% of devices
See more details

Storage
Capacity 128 GB 32 GB
Type -- eMMC 5.1 Storage
SD Slot Yes ,
Independent SD slot 		Yes ,
Independent SD slot

Security
Fingerprint Yes, in screen No

Sensors
Sensors
  • Fingerprint
  • Proximity
  • Light sensor
  • Accelerometer
  • Compass
  • Gyroscope
  • Light sensor
  • Accelerometer
  • Gravity
  • Ultrasonic proximity virtual

Audio

Audio
-
-

Others
Notifications LED -- --
Cooling system No No
Gaming buttons No No

User reviews

Does it have good sound?
7.3
6.1
Does it work smoothly in everyday use?
6.7
4.2
What's your experience been with demanding games?
5.6
2.8
Number of reviews
121 reviews
154 reviews

Camera

Main
No. of cameras Quad rear camera Rear camera
1
Camera type

Standard

Standard
Resolution 48 Mpx 13 Mpx
Aperture ƒ/ 2.0 ƒ/ 2.2
Optical zoom -- --
View angle -- --
Sensor Sony IMX582 Exmor RS Unknown
Type CMOS CMOS
ISO -- --
Pixel size 0.80 µm --
Pixel Binning 1-4 (2x2) --
Sensor size 1/2.96" --
2
Camera type

Wide Angle lens
--
Resolution
12 Mpx
Aperture
ƒ/ 2.2
Optical zoom
--
View angle
--
Sensor
Unknown
Type
--
Pixel size
1.12 µm
Pixel Binning
--
Sensor size
--
3
Camera type

Portrait mode (depth)
--
Resolution
5 Mpx
Aperture
ƒ/ 2.2
Optical zoom
--
View angle
--
Sensor
Unknown
Type
--
Pixel size
1.12 µm
Pixel Binning
--
Sensor size
--
4
Camera type

Macro lens
--
Resolution
5 Mpx
Aperture
ƒ/ 2.4
Optical zoom
--
View angle
--
Sensor
Unknown
Type
--
Pixel size
1.12 µm
Pixel Binning
--
Sensor size
--

Features
Flash LED LED
Optical Stabilisation No No
Slow Motion Video Yes,
120 fps 		Yes,
60 fps
Others
  • 4K Video
  • Digital zoom
  • Quadruple camera
  • Digital image stabilization
  • Autofocus
  • Touch focus
  • Continuous shooting
  • Geotagging
  • HDR
  • Face detection
  • White balance settings
  • ISO settings
  • Exposure compensation
  • Scene mode
  • Self-timer
  • Digital zoom
  • Autofocus
  • Touch focus
  • Manual focus
  • Continuous shooting
  • Geotagging
  • Panorama
  • HDR
  • Face detection
  • White balance settings
  • ISO settings
  • Exposure compensation
  • Scene mode
  • Self-timer

Selfie
SELF
Camera type

Dedicated

Dedicated
Resolution 32 Mpx 5 Mpx
Aperture ƒ/ 2.2 ƒ/ 2.2
Optical zoom -- --
View angle -- --
Sensor Sony IMX616 Unknown
Type CMOS --
Pixel size 0.80 µm 1.12 µm
Pixel Binning 1-4 (2x2) --
Sensor size 1/2.8" --
Others
--
--

DxOMark Score
DxOMark Score -- --

User reviews

Quality of daytime photos
8.2
5.4
Quality of nighttime photos
6.4
3.4
Quality of selfies
7.5
4.6
Does it have a powerful flash?
7.9
6.3
Number of reviews
121 reviews
154 reviews

Connectivity

Network compatibility

5G -- --
4G LTE
  • B1 (2100)
  • B2 (1900)
  • B3 (1800)
  • B4 (1700/2100 AWS 1)
  • B5 (850)
  • B7 (2600)
  • B8 (900)
  • B12 (700)
  • B13 (700)
  • B17 (700)
  • B20 (800)
  • B26 (850)
  • B28b (700)
  • B28a (700)
  • B38 (TDD 2600)
  • B40 (TDD 2300)
  • B41 (TDD 2500)
  • B66 (1700/2100)
  • B1 (2100)
  • B2 (1900)
  • B3 (1800)
  • B4 (1700/2100 AWS 1)
  • B5 (850)
  • B7 (2600)
  • B8 (900)
  • B20 (800)
  • B28b (700)
  • B28a (700)
  • B38 (TDD 2600)
  • B40 (TDD 2300)
  • B41 (TDD 2500)
3G
  • B1 (2100)
  • B2 (1900)
  • B4 (1700/2100 AWS A-F)
  • B5 (850)
  • B8 (900)
  • B1 (2100)
  • B2 (1900)
  • B4 (1700/2100 AWS A-F)
  • B5 (850)
  • B8 (900)
2G
  • B2 (1900)
  • B3 (1800)
  • B5 (850)
  • B8 (900)
  • B2 (1900)
  • B3 (1800)
  • B5 (850)
  • B8 (900)

SIM card
Dual SIM Dual Sim Dual Standby Dual Sim Dual Standby
Type
  • Nano SIM
  • Nano SIM
  • Nano SIM
  • Nano SIM

Wi-Fi
Wi-Fi
  • 802.11a
  • 802.11b
  • 802.11g
  • 802.11n
  • 802.11n 5GHz
  • 802.11ac
  • 802.11b
  • 802.11g
  • 802.11n
Others
  • Dual band
  • Wi-Fi Hotspot
  • Wi-Fi Direct
  • Wi-Fi Display
  • Wi-Fi Hotspot
  • Wi-Fi Direct

Bluetooth
Version Bluetooth 5.0 Bluetooth 5.0 LE Low energy consumption
Others
  • A2DP (Advanced Audio Distribution Profile)
  • AVRCP (Audio/Visual Remote Control Profile)
  • DIP (Device ID Profile)
  • HFP (Hands-Free Profile)
  • HID (Human Interface Profile)
  • HSP (Headset Profile)
  • MAP (Message Access Profile)
  • PAN (Personal Area Networking Profile)
  • OPP (Object Push Profile)
  • PBAP/PAB (Phone Book Access Profile)
  • HOGP
  • ANT+
  • A2DP (Advanced Audio Distribution Profile)
  • EDR (Enhanced Data Rate)
  • LE (Low Energy)

Navigation
Navigation
  • GPS
  • A-GPS
  • GLONASS
  • Beidou
  • Galileo
  • GPS
  • A-GPS
  • GLONASS
  • Beidou

USB
USB
  • Charging
  • Mass Storage
  • USB On-The-Go (OTG)
  • USB Type C
  • Charging
  • Mass Storage
  • USB On-The-Go (OTG)

SAR
European measurement

The European Union sets a limit of 2 W/kg averaged over 10 grams of tissue.

 -- 0.398 W/Kg on head
1.186 W/Kg on body
American measurement

The FCC limit is 1.6 W/kg measured in a volume of 1 gram of tissue

 -- 0.901 W/Kg on head
0.647 W/Kg on body

Others
Others
  • NFC
  • Audio Jack
  • Radio FM
  • Computer sync
  • OTA sync
  • Tethering.
  • VoLTE
  • ANT+
  • Audio Jack
  • Radio FM
  • Computer sync
  • OTA sync
  • Tethering.
  • VoLTE

User reviews

Does it have good coverage for calls?
8.2
6.8
Quality of the GPS
8.4
6.4
And the WiFi?
8.3
6.9
Number of reviews
121 reviews
154 reviews

Battery

Battery
Capacity
4000 mAh
See more details
5000 mAh
See more details
Type Li-Polymer Li-Ion
Fast charge Yes,
15.0W 		Yes,
10.0W
Others
  • Non-removable
  • Non-removable

User reviews

How long does the battery last?
  • 8%
    Less than half day
  • 30%
    Less than a day
  • 39%
    One day
  • 20%
    More than one day
  • 3%
    Two days or more
  • 2%
    Less than half day
  • 8%
    Less than a day
  • 36%
    One day
  • 40%
    More than one day
  • 14%
    Two days or more
Number of reviews
121 reviews
154 reviews

Software

Software
Operating System
  • Android 13
    Android 13 Tiramisu, 4 years ago
  • MIUI V12 (Android 11)
    Android 11 Red Velvet Cake, 6 years ago
Google Services With Google Mobile Services With Google Mobile Services

User reviews

Did it come with preinstalled applications?
  • 6%
    It comes with a clean operating system
  • 69%
    It has preinstalled apps but they don't bother me
  • 25%
    It has preinstalled apps that I can't uninstall
  • 6%
    It comes with a clean operating system
  • 64%
    It has preinstalled apps but they don't bother me
  • 30%
    It has preinstalled apps that I can't uninstall
Do you regularly receive updates?
  • 8%
    Never
  • 6%
    Once a year
  • 46%
    Every six months
  • 39%
    Every two months or less
  • 29%
    Never
  • 14%
    Once a year
  • 32%
    Every six months
  • 24%
    Every two months or less
Number of reviews
121 reviews
154 reviews
Prices
From $ 139 --
From $ 79 --

Others

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