vivo X21 UD

Added: 03.22.18 | Updated: 02.26.20
  • Model: X21 UD
  • Brand: vivo
  • Rating: 5.00 out of 5 (1 votes)
  • Price: 550 EUR
  • Year of manufacture: 2018
  • Dimensions: 154.5 x 74.8 x 7.4 mm
  • Weight: 156.2 g
  • Chipset: Qualcomm SDM660 Snapdragon 660 (14 nm)
  • Built-in memory: 128 GB
  • Screen: Super AMOLED 6.28 inches
  • Battery: 3200 mAh
  • Rear camera: Dual, 12MP
  • Front camera: Single, 12MP

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vivo X21 UD specs

Common | Price | Design | Screen | Hardware | Memory | Software | Main Camera | Selfie camera | Cellular | Connectivity | Battery | Audio | Sensors | Performance Benchmark

vivo X21 UD Release dateCommon

Brand and model

vivo X21 UD

Launch date

2018, March

vivo X21 UD PricePrice

First price

550 EUR

vivo X21 UD dimension, size, weightDesign


6.08 in (154.5 mm)


2.94 in ( 74.8 mm)


0.29 in ( 7.4 mm)


5.51 oz (156.2 grams)

Build materials

Front glass, aluminum body

Water resistant


Black, Ruby Red


Buy a case from Amazon

vivo X21 UD screenScreen

Technology Super AMOLED

6.28 in

Screen Area

98.4 cm2


1080 x 2280 px

Points per inch

402 PPI

Color Depth


Ratio (height:width)


Ratio (screen:body)


Screen protector

Buy a screen protector from Amazon

vivo X21 UD ProcessorHardware


- Qualcomm SDM660 Snapdragon 660 (14 nm)


- Octa-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260)


- Adreno 512

vivo X21 UD Memory and storageMemory

Internal Memory

128 GB, 6 GB RAM

Memory Card Slot

microSD, up to 256 GB (uses SIM 2 slot)

vivo X21 UD SoftwareSoftware

Operating System (OS)

Android 8.1 (Oreo); Funtouch 4

User Interface

Funtouch 4

vivo X21 UD main camera specsMain Camera

Number of Cameras



-12 MP, f/1.8, 1/2.55'', 1.4µm, dual pixel PDAF
-5 MP, f/2.4, depth sensor


LED flash, HDR, panorama

Video Recording 1080p@30fps

vivo X21 UD selfie camera specsSelfie camera

Number of Cameras



-12 MP, f/2.0

Video Recording 1080p@30fps

vivo X21 UD Cellular BandsCellular

-2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 
-3G - HSDPA 850 / 900 / 1900 / 2100
-4G - LTE band 1(2100), 2(1900), 3(1800), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
SIM Card Hybrid Dual SIM (Nano-SIM, dual stand-by)
Speed HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps

vivo X21 UD wifi bluetooth gps nfcConnectivity

Wi-Fi Wi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot
Bluetooth 5.0, A2DP, LE
USB microUSB 2.0, USB On-The-Go

vivo X21 UD Battery type and CapacityBattery


3200 mAh


 Non-removable Li-Ion


-Fast battery charging

vivo X21 UD sound and multimediaAudio

Headphone Jack Yes
Radio FM radio
Others -32-bit/192kHz audio
-Active noise cancellation with dedicated mic


Fingerprint (under display), accelerometer, proximity, compass

Other specifications


Performance Benchmark

vivo X21 UD antutu score Antutu Score

Antutu 7 Score143592 (Position 163 out of 2128)

See the page vivo X21 UD Antutu where you will find details about the Antutu result of the device, rankings, and similar models

Disclaimer: This information is based on public data and official specifications from vivo. However, there may be differences in specifications.

vivo X21 UD video reviews

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vivo X21 UD Reviews and Opinions

Rate this smartphone
5.00 / 5

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Frequently Asked Questions

How much does vivo X21 UD cost?

The price of the vivo X21 UD varies based on the specific model and storage capacity. As of the latest update, the base model starts at 550 EUR. Prices increase for models with larger storage capacity and additional features.

When did the vivo X21 UD come out?

vivo X21 UD mobile was launched on in these colors: Black, Ruby Red.

What is the size and weight of vivo X21 UD ?

The vivo X21 UD has dimensions of Height: 154.5 mm Width: 74.8 mm Thickness: 7.4 mm and weighs approximately 156.2 grams.

What is the screen size and resolution of vivo X21 UD?

When measured as a standard rectangular shape, the screen is 6.28 inches diagonally offering a resolution of 1080 x 2280 px at a pixel density of 402 ppi.

How much memory and storage does a vivo X21 UD have?

Device comes with chipset Qualcomm SDM660 Snapdragon 660 (14 nm) with processor Octa-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260). vivo X21 UD is available with internal memory of 128 GB, 6 GB RAM.

What are the main camera specifications and megapixels of the vivo X21 UD?

The device have a Dual rear camera setup with specs of 12 MP, f/1.8, 1/2.55'', 1.4µm, dual pixel PDAF 5 MP, f/2.4, depth sensor and features like LED flash, HDR, panorama

What are the front camera specs and MP of the vivo X21 UD?

The device comes with Single front camera setup with specs of 12 MP, f/2.0 and features like