vivo X21 vs vivo X21 UD: Comparison

Comparison of features, performance, design, battery, camera and connectivity between the following smartphones: vivo X21 vs vivo X21 UD. The complete information of specifications to decide which to buy.

Compare
vivo X21vivo X21China · 6GB · 128GB
vivo X21 UDvivo X21 UDChina · 6GB · 128GB
Technical data sheets

Basics
vivo X21
vivo X21
China · 6GB · 128GB
View datasheet
vs
vivo X21 UD
vivo X21 UD
China · 6GB · 128GB
View datasheet
vs

Score
Ki Cost-effective
Score		 -- Not available -- Not available
Design and Screen score --Design & Materials --Design & Materials
Performance and Hardware score --Performance & Hardware --Performance & Hardware
Camera score --Camera --Camera
Connectivity score -- Connectivity -- Connectivity
Battery score --Battery --Battery

User reviews
User score
--
No user reviews
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4 reviews

Technical specifications of the vivo X21 vs vivo X21 UD

Specs stores to buy vivo X21 vivo X21
China · 6GB · 128GB 		stores to buy vivo X21 UD vivo X21 UD
China · 6GB · 128GB
Inches 6.28" 6.28"
Resolution FHD+ FHD+
Usable surface 88% useful 85% useful
Aspect Ratio 18:9 19:9
Dimensions 74.8 mm
154.5 mm
7.4 mm 		74.8 mm
154.5 mm
7.4 mm
Weight 175 g 175 g
Micro SnapD. 660
Octa-Core 		SnapD. 660
Octa-Core
RAM 6 GB RAM 6 GB RAM
Storage 128 GB 128 GB
AnTuTu 143.707
v7 		143.707
v7
Battery 3200 mAh 3200 mAh
Main Camera 1
12 Mpx · ƒ/1.8
S5K2L9
2 		1
12 Mpx · ƒ/1.8
S5K2L9
2
Selfie Camera SELF 12 Mpx · ƒ/2.0 SELF 12 Mpx · ƒ/2.0
Bands
OS Android 8.0 Oreo Android 8.0 Oreo

Brand
Brand vivo vivo
Aliases -- --

Release Date
Release date March 2018,
8 years ago 		March 2018,
8 years ago
State Not available Not available
Market China China

Design & Materials

Structure

vivo X21
vivo X21 UD
vivo X21
vivo X21 UD
Size
74.8 mm • 154.5 mm • 7.4 mm
See more details
 Print 3D Model
74.8 mm • 154.5 mm • 7.4 mm
See more details
 Print 3D Model
Weight 175 g 175 g
Usable surface 88 % 85 %
Materials Aluminium alloy Aluminium alloy
Resistance - -
Colors
Black
White
Red
Black
Red

Screen
Diagonal 6.28" 6.28"
Type Super AMOLED Super AMOLED
Aspect Ratio 18:9 19:9
Resolution FHD+
1080 x 2160 px 		FHD+
1080 x 2280 px
Brightness -- --
Peak brightness -- --
Maximum brightness (HBM) -- --
Density 402 Pixels per inch 402 Pixels per inch

Others

Others
  • Medium-sized Notch
  • LED Notifications
  • Capacitive
  • Multi-touch
  • Frameless
  • Medium-sized Notch
  • LED Notifications
  • Capacitive
  • Multi-touch
  • Frameless

User reviews

Is it a drop-resistant and scratch-resistant smartphone?
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Do you think it's a nice phone?
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Is it comfortable?
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Can you see it well in the sunlight?
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Number of reviews
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Performance & Hardware

Processor
Model Qualcomm Snapdragon 660 MSM8976 Plus Qualcomm Snapdragon 660 MSM8976 Plus
CPU 4x Kryo 260 2.2 Ghz + 4x Kryo 260 1.8 Ghz 4x Kryo 260 2.2 Ghz + 4x Kryo 260 1.8 Ghz
Type Octa-Core Octa-Core
Manufacturing 14 nm 14 nm
64 Bits Yes Yes

Graphics
GPU Qualcomm Adreno 512 Qualcomm Adreno 512

RAM
RAM 6 GB 6 GB
Type -- --

Antutu
Score
143.707
Antutu v7
Overall performance better than 29% of devices
See more details
143.707
Antutu v7
Overall performance better than 29% of devices
See more details

Storage
Capacity 128 GB 128 GB
Type -- --
SD Slot Yes ,
Slot for SD or second SIM card 		Yes ,
Slot for SD or second SIM card

Security
Fingerprint Yes, in the back Yes, in screen

Sensors
Sensors
  • Fingerprint
  • Proximity
  • Light sensor
  • Accelerometer
  • Gyroscope
  • Gravity
  • Fingerprint
  • Proximity
  • Light sensor
  • Accelerometer
  • Gyroscope
  • Gravity

Audio

Audio
-
-

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

User reviews

Does it have good sound?
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Does it work smoothly in everyday use?
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What's your experience been with demanding games?
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Number of reviews
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Camera

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

Standard

Standard
Resolution 12 Mpx 12 Mpx
Aperture ƒ/ 1.8 ƒ/ 1.8
Optical zoom -- --
View angle -- --
Sensor Samsung S5K2L9 Samsung S5K2L9
Type ISOCELL ISOCELL
ISO -- --
Pixel size 1.40 µm 1.40 µm
Pixel Binning -- --
Sensor size 1/2.55" 1/2.55"
2
Camera type

Portrait mode (depth)

Portrait mode (depth)
Resolution
5 Mpx
5 Mpx
Aperture
ƒ/ 2.4
ƒ/ 2.4
Optical zoom
--
--
View angle
--
--
Sensor
Samsung S5K4E8
Samsung S5K4E8
Type
CMOS
CMOS
Pixel size
1.40 µm
1.40 µm
Pixel Binning
--
--
Sensor size
1/4"
1/4"

Features
Flash Dual LED Dual LED
Optical Stabilisation Yes Yes
Slow Motion Video Yes,
120 fps 		Yes,
120 fps
Others
  • Digital zoom
  • Dual camera
  • Optical Stabilization (OIS)
  • Autofocus
  • Touch focus
  • Continuous shooting
  • Geotagging
  • Panorama
  • HDR
  • Face detection
  • White balance settings
  • ISO settings
  • Exposure compensation
  • Scene mode
  • Self-timer
  • Digital zoom
  • Dual camera
  • Optical Stabilization (OIS)
  • Autofocus
  • Touch 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 12 Mpx 12 Mpx
Aperture ƒ/ 2.0 ƒ/ 2.0
Optical zoom -- --
View angle -- --
Sensor Samsung S5K2L8 Samsung S5K2L8
Type ISOCELL ISOCELL
Pixel size 1.28 µm 1.28 µm
Pixel Binning -- --
Sensor size 1/2.8" 1/2.8"
Others
--
--

DxOMark Score
DxOMark Score -- --

User reviews

Quality of daytime photos
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Quality of nighttime photos
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Quality of selfies
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Does it have a powerful flash?
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Number of reviews
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Connectivity

Network compatibility

5G -- --
4G LTE
  • B1 (2100)
  • B2 (1900)
  • B3 (1800)
  • B4 (1700/2100 AWS 1)
  • B5 (850)
  • B8 (900)
  • B34 (TDD 2100)
  • B38 (TDD 2600)
  • B39 (TDD 1900)
  • B40 (TDD 2300)
  • B41 (TDD 2500)
  • B1 (2100)
  • B2 (1900)
  • B3 (1800)
  • B4 (1700/2100 AWS 1)
  • B5 (850)
  • B8 (900)
  • B34 (TDD 2100)
  • B38 (TDD 2600)
  • B39 (TDD 1900)
  • B40 (TDD 2300)
  • B41 (TDD 2500)
3G
  • B1 (2100)
  • B2 (1900)
  • B5 (850)
  • B8 (900)
  • B34 (TD 2000)
  • B39 (TD 1900+)
  • B1 (2100)
  • B2 (1900)
  • B5 (850)
  • B8 (900)
  • B34 (TD 2000)
  • B39 (TD 1900+)
2G
  • CDMA BC0 (800)
  • B2 (1900)
  • B3 (1800)
  • B5 (850)
  • B8 (900)
  • CDMA BC0 (800)
  • 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 MiMO
  • Dual band
  • Wi-Fi Hotspot
  • Wi-Fi Direct
  • Wi-Fi MiMO

Bluetooth
Version Bluetooth 5.0 Bluetooth 5.0
Others
  • A2DP (Advanced Audio Distribution Profile)
  • A2DP (Advanced Audio Distribution Profile)

Navigation
Navigation
  • GPS
  • A-GPS
  • GLONASS
  • Beidou
  • GPS
  • A-GPS
  • GLONASS
  • Beidou
  • SUPL

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

 -- --
American measurement

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

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Others
Others
  • Audio Jack
  • Computer sync
  • OTA sync
  • Tethering.
  • VoLTE
  • Audio Jack
  • Computer sync
  • OTA sync
  • Tethering.
  • VoLTE

User reviews

Does it have good coverage for calls?
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Quality of the GPS
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And the WiFi?
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Number of reviews
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Battery

Battery
Capacity
3200 mAh
See more details
3200 mAh
See more details
Type Li-Polymer Li-Polymer
Fast charge Yes Yes
Others
  • Non-removable
  • Non-removable

User reviews

How long does the battery last?
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Number of reviews
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Software

Software
Operating System
  • Funtouch 3.2 OS (Android 8.0 Oreo)
    Android 8.0 Oreo, 9 years ago
  • Funtouch 3.2 OS (Android 8.0 Oreo)
    Android 8.0 Oreo, 9 years ago
Google Services Without Google Mobile services Without Google Mobile services

User reviews

Did it come with preinstalled applications?
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Do you regularly receive updates?
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Number of reviews
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Prices
Prices unavailable
Prices unavailable

Others

Common comparisons