Samsung Galaxy S21 Ultra vs Xiaomi Redmi Note 15 Pro 5G: Comparison

Comparison of features, performance, design, battery, camera and connectivity between the following smartphones: Samsung Galaxy S21 Ultra vs Xiaomi Redmi Note 15 Pro 5G. The complete information of specifications to decide which to buy.

Compare
Samsung Galaxy S21 UltraSamsung Galaxy S21 UltraGlobal · 12GB · 128GB · SM-G998B
Xiaomi Redmi Note 15 Pro 5GXiaomi Redmi Note 15 Pro 5GGlobal · 8GB · 256GB
Technical data sheets

Basics
Samsung Galaxy S21 Ultra
Samsung Galaxy S21 Ultra
Global · 12GB · 128GB · SM-G998B
View datasheet
vs
Xiaomi Redmi Note 15 Pro 5G
Xiaomi Redmi Note 15 Pro 5G
Global · 8GB · 256GB
View datasheet
vs

Score
Ki Cost-effective
Score		 8.3 Ki Cost-effective
Score 		8.4 Ki Cost-effective
Score
Design and Screen score 7.5Design & Materials 8.1Design & Materials
Performance and Hardware score 7.2Performance & Hardware 7.2Performance & Hardware
Camera score 8.7Camera 7.0Camera
Connectivity score 8.2 Connectivity 7.8 Connectivity
Battery score 6.9 Battery 8.0 Battery

User reviews
User score
8.9
104 reviews
8.6
21 reviews

Technical specifications of the Samsung Galaxy S21 Ultra vs Xiaomi Redmi Note 15 Pro 5G

Specs stores to buy Samsung Galaxy S21 Ultra Samsung Galaxy S21 Ultra
Global · 12GB · 128GB · SM-G998B 		Xiaomi Redmi Note 15 Pro 5G price comparison Xiaomi Redmi Note 15 Pro 5G
Global · 8GB · 256GB
Inches 6.8" 6.83"
Resolution WQHD+ FHD+
Usable surface 89% useful 86% useful
Aspect Ratio 20:9 20:9
Dimensions 75.6 mm
165.1 mm
8.9 mm 		78.1 mm
163.6 mm
7.9 mm
Weight 227 g 204 g
Micro Exynos 2100
Octa-Core 		Dimensity 7400
Octa-Core
RAM 12 GB RAM 8 GB RAM
Storage 128 GB 256 GB
AnTuTu 1.123.654
v12 		851.542
v11
Battery 5000 mAh 6580 mAh
Main Camera 1
108 Mpx · ƒ/1.8
S5KHM3
2 3 4 		1
200 Mpx · ƒ/1.7
S5KHP3SP
2
Selfie Camera SELF 44 Mpx · ƒ/2.2 SELF 20 Mpx · ƒ/2.2
Bands
OS Android 14 Upside-down cake Android 15

Brand
Brand Samsung Xiaomi
Aliases SM-G998B 25080RABDG, Xiaomi Redmi Note 15 Pro

Release Date
Release date January 2021,
5 years ago 		August 2025,
1 year ago
State On Sale On Sale
Market Global Global

Design & Materials

Structure

Samsung Galaxy S21 Ultra
Xiaomi Redmi Note 15 Pro 5G
Samsung Galaxy S21 Ultra
Xiaomi Redmi Note 15 Pro 5G
Size
75.6 mm • 165.1 mm • 8.9 mm
See more details
 Print 3D Model
78.1 mm • 163.6 mm • 7.9 mm
See more details
 Print 3D Model
Weight 227 g 204 g
Usable surface 89 % 86 %
Materials Glass, Aluminium Plastic
Resistance IP68 IP68
IP69
Splash resistant
Colors
Black
Silver
Gray
Brown
Black
Blue
Gold
Gray
Purple
Dark Purple
Titanium

Screen
Diagonal 6.8" 6.83"
Type AMOLED • Dynamic Amoled 2x AMOLED
Aspect Ratio 20:9 20:9
Resolution WQHD+
1440 x 3200 px 		FHD+
1280 x 2772 px
Brightness 1500 nits --
Peak brightness -- 3200 nits
Maximum brightness (HBM) -- 1200 nits
Density 516 Pixels per inch 447 Pixels per inch

Others

Others
  • Hole-punch Notch
  • Refresh rate 120 Hz
  • Peak brightness - 1500 cd/m²
  • Always-On Display
  • HDR10+
  • Scratch resistant
  • Dual Edge display
  • Corning Gorilla Glass Victus
  • S-Pen
  • Capacitive
  • Multi-touch
  • Frameless
  • LTPO (Low Temperature PolySilicon oxide)
  • Hole-punch Notch
  • SGS Certified
  • 1920 Hz PWM
  • TUV Rheinland Low Blue Light
  • TÜV Rheinland Flicker-free Certified
  • 3840 Hz PWM
  • Refresh rate 120 Hz
  • Touch sampling rate 240 Hz
  • Touch sampling rate 480 Hz
  • 5000000:1 contrast ratio
  • TÜV Rheinland Eye Comfort Certification
  • HDR10+
  • DCI-P3
  • 12 Bits panel (10-bit +2-bit FRC)
  • Scratch resistant
  • Dragontrail glass
  • Corning Gorilla Glass Victus 2
  • Capacitive
  • Multi-touch
  • Frameless

User reviews

Is it a drop-resistant and scratch-resistant smartphone?
8.3
9.1
Do you think it's a nice phone?
9.4
8.9
Is it comfortable?
8.6
8.8
Can you see it well in the sunlight?
9.0
9.0
Number of reviews
104 reviews
21 reviews

Performance & Hardware

Processor
Model Samsung Exynos 2100 MediaTek Dimensity 7400
CPU 1x Cortex-X1 2,91 GHz + 3x Cortex-A78 2,81 GHz + 4x Cortex-A55 2,21 GHz. 4x2.6 GHz Cortex-A78 + 4x 2.0 GHz Cortex-A55
Type Octa-Core Octa-Core
Manufacturing 5 nm 4 nm
64 Bits Yes Yes

Graphics
GPU ARM Mali-G78 MP14 Mali-G615 MP2

RAM
RAM 12 GB 8 GB
Type RAM LPDDR5 LPDDR4X RAM

Antutu
Score
1.123.654
Antutu v12
Overall performance better than 84% of devices
See more details
851.542
Antutu v11
Overall performance better than 80% of devices
See more details

Storage
Capacity 128 GB 256 GB
Type UFS Storage 3.1 UFS Storage 2.2
SD Slot No No

Security
Fingerprint Yes, in screen Yes, in screen

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

Audio

Audio
  • Dolby Atmos
  • Hi-Res Audio
  • Noise cancellation microphone
  • Stereo Speakers
  • Dolby Atmos
  • Hi-Res Audio
  • Stereo Speakers

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

User reviews

Does it have good sound?
9.4
8.9
Does it work smoothly in everyday use?
9.5
8.3
What's your experience been with demanding games?
8.8
8.2
Number of reviews
104 reviews
21 reviews

Camera

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

Standard

Standard
Resolution 108 Mpx 200 Mpx
Aperture ƒ/ 1.8 ƒ/ 1.7
Optical zoom -- --
View angle -- --
Sensor Samsung S5KHM3 Samsung S5KHP3SP
Type ISOCELL ISOCELL
ISO -- --
Pixel size 0.80 µm --
Pixel Binning 1-9 (3x3) 1-4 (2x2)
Sensor size 1/1.33" 1/1.4"
2
Camera type

Wide Angle + Macro

Wide Angle lens
Resolution
12.2 Mpx
8 Mpx
Aperture
ƒ/ 2.2
ƒ/ 2.8
Optical zoom
--
--
View angle
--
--
Sensor
Sony IMX563
Omnivision OV08F
Type
CMOS
CMOS
Pixel size
1.40 µm
--
Pixel Binning
--
--
Sensor size
1/2.55"
--
3
Camera type

Telephoto + portrait
--
Resolution
10.8 Mpx
Aperture
ƒ/ 2.4
Optical zoom
--
View angle
--
Sensor
Samsung S5K3J1
Type
ISOCELL
Pixel size
1.22 µm
Pixel Binning
--
Sensor size
1/2.65"
4
Camera type

Telephoto lens
--
Resolution
10.8 Mpx
Aperture
ƒ/ 4.9
Optical zoom
--
View angle
--
Sensor
Samsung S5K3J1
Type
ISOCELL
Pixel size
1.22 µm
Pixel Binning
--
Sensor size
1/2.65"

Features
Flash LED LED
Optical Stabilisation Yes Yes
Slow Motion Video Yes,
960 fps 		Yes,
120 fps
Others
  • 4K Video
  • 8K Video
  • Digital zoom
  • Optical zoom
  • OIS on optical zoom Lens
  • Quadruple camera
  • Digital image stabilization
  • Optical Stabilization (OIS)
  • Autofocus
  • Touch focus
  • Continuous autofocus
  • Manual focus
  • Laser AF
  • Phase detection autofocus (PDAF)
  • Continuous shooting
  • Geotagging
  • Panorama
  • HDR
  • Face detection
  • White balance settings
  • ISO settings
  • Exposure compensation
  • Scene mode
  • Self-timer
  • RAW
  • Night Mode
  • 4K Video
  • Digital zoom
  • Dual camera
  • Digital image stabilization
  • Optical Stabilization (OIS)
  • 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

Selfie
SELF
Camera type

Dedicated

Dedicated
Resolution 44 Mpx 20 Mpx
Aperture ƒ/ 2.2 ƒ/ 2.2
Optical zoom -- --
View angle -- --
Sensor Samsung S5KGH1 Omnivision OV20B
Type ISOCELL CMOS
Pixel size 0.70 µm 0.80 µm
Pixel Binning 1-4 (2x2) --
Sensor size 1/2.65" 1/4"
Others
--
--

DxOMark Score
DxOMark Score
115
Camera
121Photo
100Video
135
Selfie
133Photo
140Video
 --

User reviews

Quality of daytime photos
9.4
8.4
Quality of nighttime photos
8.3
7.4
Quality of selfies
9.0
8.0
Does it have a powerful flash?
9.1
8.1
Number of reviews
104 reviews
21 reviews

Connectivity

Network compatibility

5G
  • n1 (2100)
  • n3 (1800)
  • n5 (850)
  • n7 (2600)
  • n8 (900)
  • n20 (800)
  • n28b (700)
  • n28a (700)
  • n38 (2600)
  • n40 (2300)
  • n41 (2500)
  • n66 (1700)
  • n77 (3700)
  • n78 (3500)
  • n1 (2100)
  • n2 (1900 PCS)
  • n3 (1800)
  • n5 (850)
  • n7 (2600)
  • n8 (900)
  • n20 (800)
  • n26 (850)
  • n28b (700)
  • n28a (700)
  • n38 (2600)
  • n40 (2300)
  • n41 (2500)
  • n48 (3500)
  • n66 (1700)
  • n77 (3700)
  • n78 (3500)
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)
  • B18 (800)
  • B19 (800)
  • B20 (800)
  • B25 (1900+)
  • B26 (850)
  • B28b (700)
  • B28a (700)
  • B32 (1500)
  • B38 (TDD 2600)
  • B39 (TDD 1900)
  • 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)
  • B13 (700)
  • B17 (700)
  • B18 (800)
  • B19 (800)
  • B20 (800)
  • B26 (850)
  • B28b (700)
  • B28a (700)
  • B32 (1500)
  • B38 (TDD 2600)
  • B40 (TDD 2300)
  • B41 (TDD 2500)
  • B42 (TDD 3500)
  • B48 (TDD 3600)
  • B66 (1700/2100)
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)
  • B6 (800)
  • B8 (900)
  • B19 (800)
2G
  • B2 (1900)
  • B3 (1800)
  • B5 (850)
  • B8 (900)
  • B2 (1900)
  • B3 (1800)
  • B5 (850)
  • B8 (900)
No official network bands

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

Wi-Fi
Wi-Fi
  • 802.11a
  • 802.11b
  • 802.11g
  • 802.11n
  • 802.11n 5GHz
  • 802.11ac
  • WiFi 6 (802.11ax)
  • 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
  • Wi-Fi MiMO

Bluetooth
Version Bluetooth 5.2 LE Low energy consumption Bluetooth 5.4 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)
  • LE (Low Energy)
  • MAP (Message Access Profile)
  • PAN (Personal Area Networking Profile)
  • OPP (Object Push Profile)
  • PBAP/PAB (Phone Book Access Profile)
  • ANT+
  • APT-x
  • SBC
  • A2DP (Advanced Audio Distribution Profile)
  • LE (Low Energy)
  • LDAC
  • AAC

Navigation
Navigation
  • GPS
  • A-GPS
  • GLONASS
  • Beidou
  • Galileo
  • GPS (L1+L5)
  • Galileo (E1+E5a)
  • GPS
  • A-GPS
  • GLONASS
  • Beidou
  • Galileo
  • GPS (L1+L5)
  • BeiDou (B1)

USB
USB
  • Charging
  • Mass Storage
  • USB On-The-Go (OTG)
  • USB Type C
  • USB Host 3.1
  • Charging
  • Mass Storage
  • USB On-The-Go (OTG)
  • USB Type C
  • USB Host 2.0

SAR
European measurement

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

 0.710 W/Kg on head
1.580 W/Kg on body 		--
American measurement

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

 -- --

Others
Others
  • NFC
  • OTA sync
  • Tethering.
  • NFC
  • Computer sync
  • OTA sync
  • Infrared
  • Tethering.
  • VoLTE
  • No official network bands
  • eSIM

User reviews

Does it have good coverage for calls?
9.2
8.9
Quality of the GPS
9.1
8.7
And the WiFi?
9.3
8.7
Number of reviews
104 reviews
21 reviews

Battery

Battery
Capacity
5000 mAh
See more details
6580 mAh
See more details
Type Li-Polymer Si-Carbon Li-Ion
Fast charge Yes,
25.0W 		Yes,
45.0W
Others
  • Wireless charging (15W)
  • Reverse charging
  • Wireless Reverse charging (9W)
  • Non-removable
  • Reverse charging
  • Non-removable

User reviews

How long does the battery last?
  • 3%
    Less than half day
  • 16%
    Less than a day
  • 44%
    One day
  • 30%
    More than one day
  • 8%
    Two days or more
  • 0%
    Less than half day
  • 10%
    Less than a day
  • 19%
    One day
  • 43%
    More than one day
  • 29%
    Two days or more
Number of reviews
104 reviews
21 reviews

Software

Software
Operating System
  • Android 14
    Android 14 Upside-down cake, 3 years ago
  • HyperOS 2.X (Android 15)
    Android 15 , 2 years ago
Google Services With Google Mobile Services With Google Mobile Services

User reviews

Did it come with preinstalled applications?
  • 9%
    It comes with a clean operating system
  • 78%
    It has preinstalled apps but they don't bother me
  • 13%
    It has preinstalled apps that I can't uninstall
  • 5%
    It comes with a clean operating system
  • 76%
    It has preinstalled apps but they don't bother me
  • 19%
    It has preinstalled apps that I can't uninstall
Do you regularly receive updates?
  • 3%
    Never
  • 3%
    Once a year
  • 32%
    Every six months
  • 62%
    Every two months or less
  • 0%
    Never
  • 6%
    Once a year
  • 82%
    Every six months
  • 12%
    Every two months or less
Number of reviews
104 reviews
21 reviews
Prices
From $ 222 --
From $ 295 --

Others

Common comparisons