Samsung Galaxy S21 Ultra vs Xiaomi 12: Comparison

Comparison of features, performance, design, battery, camera and connectivity between the following smartphones: Samsung Galaxy S21 Ultra vs Xiaomi 12. The complete information of specifications to decide which to buy.

Compare
Samsung Galaxy S21 UltraSamsung Galaxy S21 UltraGlobal · 12GB · 128GB · SM-G998B
Xiaomi 12Xiaomi 12Global · 8GB · 128GB
Technical data sheets

Basics
Samsung Galaxy S21 Ultra
Samsung Galaxy S21 Ultra
Global · 12GB · 128GB · SM-G998B
View datasheet
vs
Xiaomi 12
Xiaomi 12
Global · 8GB · 128GB
View datasheet
vs

Score
Ki Cost-effective
Score		 8.9 Ki Cost-effective
Score 		9.0 Ki Cost-effective
Score
Design and Screen score 8.2Design & Materials 8.5Design & Materials
Performance and Hardware score 7.6Performance & Hardware 8.2Performance & Hardware
Camera score 8.7Camera 7.8Camera
Connectivity score 8.4 Connectivity 8.9 Connectivity
Battery score 8.0 Battery 6.2 Battery

User reviews
User score
9.0
79 reviews
8.9
52 reviews

Technical specifications of the Samsung Galaxy S21 Ultra vs Xiaomi 12

Specs stores to buy Samsung Galaxy S21 Ultra Samsung Galaxy S21 Ultra
Global · 12GB · 128GB · SM-G998B 		stores to buy Xiaomi 12 Xiaomi 12
Global · 8GB · 128GB
Inches 6.8" 6.28"
Resolution WQHD+ FHD+
Usable surface 89% useful 89% useful
Aspect Ratio 20:9 20:9
Dimensions 75.6 mm
165.1 mm
8.9 mm 		69.9 mm
152.7 mm
8.2 mm
Weight 227 g 180 g
Micro Exynos 2100
Octa-Core 		SnapD. 8 Gen1
Octa-Core
RAM 12 GB RAM 8 GB RAM
Storage 128 GB 128 GB
AnTuTu 749.000
v10 		1.150.831
v10
Battery 5000 mAh 4500 mAh
Main Camera 1
108 Mpx · ƒ/1.8
S5KHM3
2 3 4 		1
50 Mpx · ƒ/1.88
IMX766
2 3
Selfie Camera SELF 44 Mpx · ƒ/2.2 SELF 32 Mpx · Unknow
Bands
OS Android 14 Upside-down cake Android 13 Tiramisu

Brand
Brand Samsung Xiaomi
Aliases SM-G998B Xiaomi Mi 12, 2201123G, Cupid

Release Date
Release date January 2021,
3 years ago 		December 2021,
2 years ago
State On Sale On Sale
Market Global Global

Design & Materials

Structure

Samsung Galaxy S21 Ultra
Xiaomi 12
Samsung Galaxy S21 Ultra
Xiaomi 12
Size
75.6 mm • 165.1 mm • 8.9 mm
See more details
 Print 3D Model
69.9 mm • 152.7 mm • 8.2 mm
See more details
 Print 3D Model
Weight 227 g 180 g
Usable surface 89 % 89 %
Materials Glass, Aluminium Aluminium alloy
Resistance IP68 -
Colors
Black

Silver

Gray

Brown
Black

Blue

Violet

Screen
Diagonal 6.8" 6.28"
Type AMOLED • Dynamic Amoled 2x AMOLED • Samsung
Aspect Ratio 20:9 20:9
Resolution WQHD+
1440 x 3200 px 		FHD+
1080 x 2400 px
Density 516 Pixels per inch 418 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
  • Refresh rate 120 Hz
  • Touch sampling rate 480 Hz
  • Peak brightness - 1100 cd/m²
  • 5000000:1 contrast ratio
  • HDR10+
  • DCI-P3
  • DisplayMate A+
  • 12 Bits panel
  • Dolby Vision
  • Scratch resistant
  • Dual Edge display
  • Corning Gorilla Glass Victus
  • Capacitive
  • Multi-touch
  • Frameless

User reviews

Is it a drop-resistant and scratch-resistant smartphone?
8.4
7.9
Do you think it's a nice phone?
9.5
9.7
Is it comfortable?
8.6
9.7
Can you see it well in the sunlight?
9.2
8.9
Number of reviews
79 reviews
52 reviews

Performance & Hardware

Processor
Model Samsung Exynos 2100 Qualcomm Snapdragon 8 Gen1
CPU 1x Cortex-X1 2,91 GHz + 3x Cortex-A78 2,81 GHz + 4x Cortex-A55 2,21 GHz. 1x3.0GHz Cortex X2 + 3x2.5GHz Cortex A710 + 4x1.80GHz Cortex A510
Type Octa-Core Octa-Core
Manufacturing 5 nm 4 nm
64 Bits Yes Yes

Graphics
GPU ARM Mali-G78 MC14 Adreno 730

RAM
RAM 12 GB 8 GB
Type RAM LPDDR5 RAM LPDDR5

Antutu
Score
749.000
Antutu v10
Overall performance better than 85% of devices
See more details
1.150.831
Antutu v10
Overall performance better than 93% of devices
See more details

Storage
Capacity 128 GB 128 GB
Type UFS Storage 3.1 UFS Storage 3.1
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
  • Gyroscope
  • RGB
  • Ultrasonic proximity virtual

Audio

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

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

User reviews

Does it have good sound?
9.5
9.1
Does it work smoothly in everyday use?
9.5
9.4
What's your experience been with demanding games?
9.0
8.0
Number of reviews
79 reviews
52 reviews

Camera

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

Standard

Standard
Resolution 108 Mpx 50 Mpx
Sensor Samsung S5KHM3 Sony IMX766
Type ISOCELL CMOS
Aperture ƒ/ 1.8 ƒ/ 1.88
ISO -- --
Pixel size 0.80 µm 1.00 µm
Pixel Binning 1-9 (3x3) 1-4 (2x2)
Sensor size 1/1.33" 1/1.56"
2
Camera type

Wide Angle + Macro

Wide Angle lens
Resolution
12.2 Mpx
13 Mpx
Sensor
Sony IMX563
Unknown
Type
CMOS
CMOS
Aperture
ƒ/ 2.2
ƒ/ 2.4
Pixel size
1.40 µm
--
Pixel Binning
--
--
Sensor size
1/2.55"
--
3
Camera type

Telephoto + portrait

Macro lens
Resolution
10 Mpx
5 Mpx
Sensor
Samsung S5K3J1
Unknown
Type
ISOCELL
--
Aperture
ƒ/ 2.4
ƒ/ 2.4
Pixel size
1.22 µm
--
Pixel Binning
--
--
Sensor size
1/2.65"
--
4
Camera type

Telephoto lens
--
Resolution
10 Mpx
Sensor
Samsung S5K3J1
Type
ISOCELL
Aperture
ƒ/ 4.9
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,
1920 fps
Others
  • 4K Video
  • 8K Video
  • Digital zoom
  • Optical zoom
  • 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
  • 8K Video
  • Digital zoom
  • Triple camera
  • Digital image stabilization
  • Optical Stabilization (OIS)
  • Ultra stable video
  • Autofocus
  • Touch focus
  • Continuous autofocus
  • Manual focus
  • 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

Selfie
SELF
Camera type

Dedicated

Dedicated
Resolution 44 Mpx 32 Mpx
Sensor Samsung S5KGH1 Samsung JD1
Type ISOCELL ISOCELL
Aperture ƒ/ 2.2 Unknow
Pixel size 0.70 µm 0.70 µm
Pixel Binning 1-4 (2x2) 1-4 (2x2)
Sensor size 1/2.65" 1/3.14"
Others
--
--

DxOMark Score
DxOMark Score
115
Mobile
121
Photo
100
Video
135
Selfie
133
Photo
140
Video
113
Mobile
118
Photo
121
Video

User reviews

Quality of daytime photos
9.5
9.4
Quality of nighttime photos
8.5
8.6
Quality of selfies
9.2
8.4
Does it have a powerful flash?
9.3
8.5
Number of reviews
79 reviews
52 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)
  • 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)
  • n79 (4700)
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)
  • 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)
  • 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)

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
  • WiFi 6 (802.11ax)
  • 802.11a
  • 802.11b
  • 802.11g
  • 802.11n
  • 802.11n 5GHz
  • 802.11ac
  • WiFi 6 (802.11ax)
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 5.2 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)
  • APT-x
  • LDAC
  • SBC
  • AAC

Navigation
Navigation
  • GPS
  • A-GPS
  • GLONASS
  • Beidou
  • Galileo
  • GPS (L1+L5)
  • Galileo (E1+E5a)
  • A-GPS
  • GLONASS
  • Beidou
  • QZSS
  • GPS (L1+L5)
  • GLONASS (L1)
  • BeiDou (B1)
  • Galileo (E1+E5a)
  • BeiDou (B2)
  • NavIC System
  • QZSS (L1 + L5)

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

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.
  • DLNA
  • VoLTE
  • Mirrorlink

User reviews

Does it have good coverage for calls?
9.2
9.2
Quality of the GPS
9.1
9.3
And the WiFi?
9.3
9.3
Number of reviews
79 reviews
52 reviews

Battery

Battery
Capacity
5000 mAh
See more details
4500 mAh
See more details
Type Li-Polymer Li-Polymer
Fast charge Yes,
25.0W 		Yes,
67.0W
Others
  • Wireless charging
  • Reverse charging
  • Non-removable
  • Wireless charging
  • Reverse charging
  • Non-removable

User reviews

How long does the battery last?
  • 3%
    Less than half day
  • 12%
    Less than a day
  • 42%
    One day
  • 33%
    More than one day
  • 10%
    Two days or more
  • 8%
    Less than half day
  • 25%
    Less than a day
  • 37%
    One day
  • 29%
    More than one day
  • 2%
    Two days or more
Number of reviews
79 reviews
52 reviews

Software

Software
Operating System
  • Android 14
    Android 14 Upside-down cake, 7 months ago
  • MIUI 14 (Android 13)
    Android 13 Tiramisu, 1 year ago
Google Services (official) Yes Yes

User reviews

Did it come with preinstalled applications?
  • 3%
    It comes with a clean operating system
  • 82%
    It has preinstalled apps but they don't bother me
  • 16%
    It has preinstalled apps that I can't uninstall
  • 4%
    It comes with a clean operating system
  • 87%
    It has preinstalled apps but they don't bother me
  • 10%
    It has preinstalled apps that I can't uninstall
Do you regularly receive updates?
  • 0%
    Never
  • 1%
    Once a year
  • 33%
    Every six months
  • 65%
    Every two months or less
  • 4%
    Never
  • 2%
    Once a year
  • 49%
    Every six months
  • 45%
    Every two months or less
Number of reviews
79 reviews
52 reviews
Prices
From $ 293 --
From $ 318 --

Others

Common comparisons