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Vivo X21 UD – Latest Price, Feature, Buying Guide

February 8, 2026 3 min read
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Medically reviewed by RX Editorial Board Medical Review Team
Last updated February 8, 2026
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Vivo X21 UD smartphone was launched in March 2018. The phone comes with a 6.28-inch touchscreen display with a resolution of 1080×2280 pixels. Vivo X21 UD is powered by an octa-core Qualcomm Snapdragon 660 processor. It comes with 6GB of RAM. The Vivo X21 UD runs Android 8.1 and is powered by a 3200mAh battery.

As far as the cameras are concerned, the Vivo X21 UD on the rear packs 12-megapixel camera. It sports a 12-megapixel camera on the front for selfies.

The Vivo X21 UD runs FunTouch 4.0 based on Android 8.1 and packs 128GB of inbuilt storage. The Vivo X21 UD is a dual-SIM (GSM and GSM) smartphone that accepts Micro-SIM and Micro-SIM cards. The Vivo X21 UD measures 154.50 x 74.80 x 7.40mm (height x width x thickness) and weighs 156.20 grams. It was launched in Ruby Red, Aurora White, and Black colours.

Connectivity options on the Vivo X21 UD include Wi-Fi 802.11 a/b/g/n/ac, GPS, Bluetooth v5.00, USB OTG, 3G, and 4G (with support for Band 40 used by some LTE networks in India). Sensors on the phone include an ambient light sensor, gyroscope, proximity sensor, and compass/ magnetometer.

Vivo X21 UD – SPECIFICATIONS

General

  • Model
    Vivo X21 UD
  • Released
    20 March, 2018
  • Status
    Available

Design

  • Type
    Bar
  • Dimensions
    154.5 mm x 74.8 mm x 7.4 mm
  • Weight
    156.2 Grams (with Battery)
  • Waterproof
    No

Display

  • Display Type
    Super AMOLED capacitive touchscreen
  • Size
    6.28-inches FHD+
  • Resolution
    2280 x 1080 Pixels, 24 bit color depth
  • Display Colors
    16M Colors
  • Pixel Density
    ~ 402 PPI Pixel per inch
  • Touch Screen
    Yes Multi Touch Support
  • Display Protection
    Yes
  • Features
    Super AMOLED FHD+ display
    Multi-Touch Screen
    ~ 402 PPI Pixel Per Inch
    Capacitive Touch
    Bezel-Less Screen
    LED Notifications
    2.5D Curved Glass

Hardware

  • CPU
    Octa-Core (4 x 2.2GHz Kryo 260 & 4 x 1.8GHz Kryo 260) CPU Clock
  • GPU
    Qualcomm Adreno 512 GPU
  • RAM (Memory)
    6GB
  • Internal Storage
    128GB
  • Memory Card Slot
    External Memory Support Up to 256GB
  • Sensors
    Proximity Sensor, Accelerometer, Compass, Ambient Light, Fingerprint Scanner (Under Mounted)

Software

  • Operating System
    Android 8.1 Oreo OS
  • User Interface
    Yes with Funtouch OS 4.0

Camera

  • Rear Camera
    12 Megapixels f/1.8 + 5 Megapixel f/2.4
  • Image
    4000 x 3000 Pixels
  • Video
    1080p@30fps, 720p@120fps
  • Flash
    Yes with Dual-LED Flash
  • Front Camera
    12 Megapixels f/2.0 with 1080P

Network

  • SIM
    Standard SIM

Connectivity

  • Wi-fi
    Wi-Fi 802.11 a/b/g/n/ac, 802.11 n 5GHz, Dual Band, Wi-Fi Direct, Wi-Fi Hotspot, Wi-Fi MiMO
  • USB
    Micro USB 2.0 with OTG, Charging and Mass Storage Function
  • GPS
    Yes, with A-GPS, GPS, GLONASS
  • NFC
  • Wireless Charging
    No
  • Headphone Jack

Battery

  • Capacity
    3,200mAh Lithium-ion
  • Placement
    Non-Removable

Media

  • Video Playback
    Yes Support 3GP, MP4, FLV, WMV, AVI, MKV, H.264, H.265
  • Video Out
    Yes with Wireless Media Connection
  • FM Radio
    Yes
  • Ring Tones
    Yes
  • Loudspeaker
    Yes
  • Handsfree
    Yes

Data

  • 4G LTE
    Yes
  • Speed
    LTE: 850 / 1800 / 1900 / 2100 / 2600 MHz LTE: 1700 / 2100 MHz LTE-TDD: 1900 MHz (Band 39) LTE-TDD: 2300 MHz (Band 40) LTE-TDD: 2500 MHz (Band 41) LTE-TDD: 2600 MHz (Band 38)
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