Xiaomi Redmi Note 15 4G vs Redmi Note 8 2021: Comparison

Comparison of features, performance, design, battery, camera and connectivity between the following smartphones: Xiaomi Redmi Note 15 4G vs Redmi Note 8 2021. The complete information of specifications to decide which to buy.

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Xiaomi Redmi Note 15 4GXiaomi Redmi Note 15 4GGlobal · 6GB · 128GB
Redmi Note 8 2021Redmi Note 8 2021Global · 4GB · 64GB
Technical data sheets

Basics
Xiaomi Redmi Note 15 4G
Xiaomi Redmi Note 15 4G
Global · 6GB · 128GB
View datasheet
vs
Redmi Note 8 2021
Redmi Note 8 2021
Global · 4GB · 64GB
View datasheet
vs

Score
Ki Cost-effective
Score		 7.7 Ki Cost-effective
Score 		6.9 Ki Cost-effective
Score
Design and Screen score 7.6Design & Materials 5.8Design & Materials
Performance and Hardware score 6.8Performance & Hardware 5.4Performance & Hardware
Camera score 6.1Camera 6.6Camera
Connectivity score 6.0 Connectivity 6.3 Connectivity
Battery score 7.8 Battery 5.3 Battery

User reviews
User score
8.6
17 reviews
7.5
21 reviews

Technical specifications of the Xiaomi Redmi Note 15 4G vs Redmi Note 8 2021

Specs where to buy Xiaomi Redmi Note 15 4G Xiaomi Redmi Note 15 4G
Global · 6GB · 128GB 		where to buy Redmi Note 8 2021 Redmi Note 8 2021
Global · 4GB · 64GB
Inches 6.77" 6.3"
Resolution FHD+ FHD+
Usable surface 89% useful 80% useful
Aspect Ratio 20:9 19.5:9
Dimensions 75.4 mm
164.0 mm
7.9 mm 		75.3 mm
158.3 mm
8.3 mm
Weight 184 g 190 g
Micro Helio G100
Octa-Core 		Helio G85
Octa-Core
RAM 6 GB RAM 4 GB RAM
Storage 128 GB 64 GB
AnTuTu 550.000
v10 		225.154
v10
Battery 6000 mAh 4000 mAh
Main Camera 1
108 Mpx · ƒ/1.7

2 		1
48 Mpx · ƒ/1.79
S5KGM1
2 3 4
Selfie Camera SELF 20 Mpx · ƒ/2.2 SELF 13 Mpx · ƒ/2.0
Bands
OS Android 15 Android 12 Snow Cone

Brand
Brand Xiaomi Xiaomi
Aliases 2510DRA23E, MZB0M89EU --

Release Date
Release date December 2025,
8 months ago 		May 2021,
5 years ago
State On Sale On Sale
Market Global Global

Design & Materials

Structure

Xiaomi Redmi Note 15 4G
Redmi Note 8 2021
Xiaomi Redmi Note 15 4G
Redmi Note 8 2021
Size
75.4 mm • 164.0 mm • 7.9 mm
See more details
 Print 3D Model
75.3 mm • 158.3 mm • 8.3 mm
See more details
 Print 3D Model
Weight 184 g 190 g
Usable surface 89 % 80 %
Materials Plastic Plastic, P2i Nano coating, Splash resistant design
Resistance IP64
Splash resistant 		-
Colors
Black
Blue
Purple
Green
Black
White
Blue

Screen
Diagonal 6.77" 6.3"
Type AMOLED LTPS LCD
Aspect Ratio 20:9 19.5:9
Resolution FHD+
1080 x 2392 px 		FHD+
1080 x 2340 px
Density 388 Pixels per inch 409 Pixels per inch

Others

Others
  • Hole-punch Notch
  • SGS Certified
  • TUV Rheinland Low Blue Light
  • TÜV Rheinland Flicker-free Certified
  • 3840 Hz PWM
  • Refresh rate 120 Hz
  • Touch sampling rate 240 Hz
  • Peak brightness - 3200 cd/m²
  • 5000000:1 contrast ratio
  • TÜV Rheinland Eye Comfort Certification
  • HDR10+
  • DCI-P3
  • Scratch resistant
  • Corning Gorilla Glass
  • Dragontrail Pro glass
  • Capacitive
  • Multi-touch
  • Frameless
  • Water Drop Notch
  • Brightnes 500 cd/m² (typ)
  • 1500:1 contrast ratio
  • Scratch resistant
  • Corning Gorilla Glass 5
  • 2.5D curved glass glass
  • Capacitive
  • Multi-touch
  • Frameless

User reviews

Is it a drop-resistant and scratch-resistant smartphone?
8.6
7.4
Do you think it's a nice phone?
9.4
8.5
Is it comfortable?
8.7
8.0
Can you see it well in the sunlight?
9.1
6.6
Number of reviews
17 reviews
21 reviews

Performance & Hardware

Processor
Model MediaTek Helio G100 MediaTek Helio G85 (MT6769V/CZ)
CPU 2x2.2GHz Cortex-A76 + 6x2GHz Cortex-A55 2x Cortex-A75 2.0 GHz + 6x Cortex-A55 1.8 GHz
Type Octa-Core Octa-Core
Manufacturing 6 nm 12 nm
64 Bits Yes Yes

Graphics
GPU Arm Mali-G57 MC2 Arm Mali-G52 MC2 950MHz

RAM
RAM 6 GB 4 GB
Type LPDDR4X RAM LPDDR4X RAM

Antutu
Score
550.000
Antutu v10
Overall performance better than 74% of devices
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225.154
Antutu v10
Overall performance better than 57% of devices
See more details

Storage
Capacity 128 GB 64 GB
Type UFS Storage 2.2 eMMC 5.1 Storage
SD Slot Yes ,
Slot for SD or second SIM card 		Yes ,
Independent SD slot

Security
Fingerprint Yes, in screen Yes, in the back

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

Audio

Audio
  • Dolby Atmos
  • Hi-Res Audio
  • Stereo Speakers
-

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

User reviews

Does it have good sound?
8.7
7.7
Does it work smoothly in everyday use?
8.2
7.7
What's your experience been with demanding games?
6.6
6.7
Number of reviews
17 reviews
21 reviews

Camera

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

Standard

Standard
Resolution 108 Mpx 48 Mpx
Aperture ƒ/ 1.7 ƒ/ 1.79
Optical zoom -- --
View angle -- --
Sensor Samsung Samsung S5KGM1
Type ISOCELL ISOCELL
ISO -- --
Pixel size -- 0.80 µm
Pixel Binning -- 1-4 (2x2)
Sensor size -- 1/2"
2
Camera type

Portrait mode (depth)

Wide Angle lens
Resolution
2 Mpx
8 Mpx
Aperture
ƒ/ 2.4
ƒ/ 2.2
Optical zoom
--
--
View angle
--
--
Sensor
Omnivision OV02F
Omnivision OV8856
Type
CMOS
PureCel
Pixel size
1.75 µm
1.12 µm
Pixel Binning
--
--
Sensor size
1/5"
1/4"
3
Camera type
--

Macro lens
Resolution
2 Mpx
Aperture
ƒ/ 2.4
Optical zoom
--
View angle
--
Sensor
Unknown
Type
--
Pixel size
1.75 µm
Pixel Binning
--
Sensor size
--
4
Camera type
--

Portrait mode (depth)
Resolution
2 Mpx
Aperture
ƒ/ 2.4
Optical zoom
--
View angle
--
Sensor
Unknown
Type
--
Pixel size
1.75 µm
Pixel Binning
--
Sensor size
--

Features
Flash LED LED
Optical Stabilisation No No
Slow Motion Video Yes,
120 fps 		Yes,
120 fps
Others
  • Digital zoom
  • Dual camera
  • Digital image stabilization
  • Ultra stable video
  • Autofocus
  • Touch focus
  • Manual focus
  • Continuous shooting
  • Geotagging
  • Panorama
  • HDR
  • Face detection
  • White balance settings
  • ISO settings
  • Exposure compensation
  • Scene mode
  • Self-timer
  • RAW
  • Front Flash
  • Night Mode
  • 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
  • RAW

Selfie
SELF
Camera type

Dedicated

Dedicated
Resolution 20 Mpx 13 Mpx
Aperture ƒ/ 2.2 ƒ/ 2.0
Optical zoom -- --
View angle -- --
Sensor Unknown Unknown
Type CMOS --
Pixel size -- --
Pixel Binning -- --
Sensor size -- --
Others
--
--

DxOMark Score
DxOMark Score -- --

User reviews

Quality of daytime photos
8.8
7.5
Quality of nighttime photos
6.7
6.1
Quality of selfies
7.7
7.2
Does it have a powerful flash?
7.8
7.6
Number of reviews
17 reviews
21 reviews

Connectivity

Network compatibility

5G -- --
4G LTE
  • B1 (2100)
  • B3 (1800)
  • B5 (850)
  • B7 (2600)
  • B8 (900)
  • B20 (800)
  • B28b (700)
  • B28a (700)
  • B38 (TDD 2600)
  • B40 (TDD 2300)
  • B41 (TDD 2500)
  • 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)
3G
  • B1 (2100)
  • 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
  • 802.11a
  • 802.11b
  • 802.11g
  • 802.11n
  • 802.11n 5GHz
  • 802.11ac
Others
  • Dual band
  • Wi-Fi Hotspot
  • Wi-Fi Direct
  • Wi-Fi Display
  • Wi-Fi MiMO
  • Dual band
  • Wi-Fi Hotspot
  • Wi-Fi Direct
  • Wi-Fi Display

Bluetooth
Version Bluetooth 5.1 LE Low energy consumption Bluetooth 5.2 LE Low energy consumption
Others
  • A2DP (Advanced Audio Distribution Profile)
  • LE (Low Energy)
  • LDAC
  • AAC
  • A2DP (Advanced Audio Distribution Profile)
  • LE (Low Energy)
  • APT-x

Navigation
Navigation
  • GPS
  • A-GPS
  • GLONASS
  • Beidou
  • Galileo
  • GPS (L1+L5)
  • BeiDou (B1)
  • GPS
  • A-GPS
  • GLONASS
  • Beidou
  • Galileo

USB
USB
  • Charging
  • Mass Storage
  • USB On-The-Go (OTG)
  • USB Type C
  • USB Host 2.0
  • Charging
  • Host
  • Mass Storage
  • USB On-The-Go (OTG)
  • USB Type C

SAR
European measurement

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

 -- --
American measurement

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

 -- --

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

User reviews

Does it have good coverage for calls?
8.8
8.2
Quality of the GPS
8.5
8.3
And the WiFi?
8.6
8.2
Number of reviews
17 reviews
21 reviews

Battery

Battery
Capacity
6000 mAh
See more details
4000 mAh
See more details
Type Li-Polymer Li-Polymer
Fast charge Yes,
33.0W 		Yes,
18.0W
Others
  • Reverse charging
  • Non-removable
  • Non-removable

User reviews

How long does the battery last?
  • 0%
    Less than half day
  • 6%
    Less than a day
  • 6%
    One day
  • 76%
    More than one day
  • 12%
    Two days or more
  • 5%
    Less than half day
  • 24%
    Less than a day
  • 57%
    One day
  • 14%
    More than one day
  • 0%
    Two days or more
Number of reviews
17 reviews
21 reviews

Software

Software
Operating System
  • HyperOS 2.X (Android 15)
    Android 15 , 1 year ago
  • MIUI V13 (Android 12)
    Android 12 Snow Cone, 5 years ago
Google Services With Google Mobile Services With Google Mobile Services

User reviews

Did it come with preinstalled applications?
  • 0%
    It comes with a clean operating system
  • 100%
    It has preinstalled apps but they don't bother me
  • 0%
    It has preinstalled apps that I can't uninstall
  • 0%
    It comes with a clean operating system
  • 95%
    It has preinstalled apps but they don't bother me
  • 5%
    It has preinstalled apps that I can't uninstall
Do you regularly receive updates?
  • 7%
    Never
  • 0%
    Once a year
  • 57%
    Every six months
  • 36%
    Every two months or less
  • 6%
    Never
  • 11%
    Once a year
  • 61%
    Every six months
  • 22%
    Every two months or less
Number of reviews
17 reviews
21 reviews
Prices
From $ 176 --
From $ 170 --

Others

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