Vivo X21 128GB 4G/LTE Dual SIM (HK Version)

SKU 101-VIOV21-1725BK
Different Look, Distinctive Design

The X21 is designed to impress. The 19:9 FullView™ Display offers a broader and more immersive view than ever before, making every game and video even more captivating.

Two Unlocking Technologies. By harnessing the power of futuristic technologies, it’s now even easier to quickly unlock your X21, using Face Access or In-Display Fingerprint Scanning. For faster night-time unlocking, Face Access features an in-built infrared light sensor. In-Display Fingerprint Scanning is similarly easy, with just a single touch required for immediate access.*

Dual Pixel Sensors & AI Face Beauty. Radiate Yo Beauty. With Dual Pixel Sensors, the X21 camera has an incredible 24 million photographic units*. This creates clear, vivid pictures with artistic qualities even in backlight or low-light situations. There’s also AI Face Beauty, which tailors facial enhancement effects to each individual. This means clear, naturally dazzling results that enhance your unique beauty.

AI Game Mode. With the all new AI Game mode, your X21 knows it when you play games and transforms into a dedicated game console, with features to help eliminate distraction. The Background Calls feature means you can stay on calls without stopping the gaming fun, and Game Mode prevents accidental touch operations, ensuring you only make the moves you intended.

Your Intelligent Personal Assistant. Vivo believes that smartphones should be tailored to the user. That’s why the X21 smart system is boosted by AI technology to learn your habits, then develops greater understanding over time. It’s always alert to changes in use, and ready to serve you better by adapting to your unique preferences.

Powerful Performance Designed for the Future. With a Qualcomm Snapdragon 660 AIE processor and 6GB RAM, the X21 has enough power to manage complex multi-tasking challenges with ease. It’s also equipped with a 3200mAh battery, plus Dual-Charging Engine technology to keep you up and running all day long.

Deepfield & Hi-Fi, Bring Your Music to Life. The X21’s AK4376A Hi-Fi audio chip offers ultra-clear, true-to-life sound quality.


  • 1. Always on Display must be selected from the settings menu.
  • 2. This device is equipped with a hidden infrared optical sensor and photoelectric fingerprint pad. Please use our official screen protector as much as possible. If you use other screen protectors, choose one with slits over the hidden infrared optical sensor and photoelectric fingerprint pad.
  • 3. Face Access can only work when the screen is on. Turn Raise to Wake on to unlock after activating the screen.
  • 4. The front camera and the main rear camera are 12MP (with 24 million photographic units). The secondary rear camera is 5MP.
  • 5. Karaoke Mode is currently available in WeSing only. Please refer to vivo's official website for an updated list of supporting apps.
Tech Specs

Basic Specifications

  • OS: Android 8.1
  • Platform: SDM660 AIE
  • Processor: Octa-core (2.2GHz*4+1.8GHz*4)
  • Browser: vivo Browser
  • Memory: 128GB ROM+6GB RAM
  • Memory Expansion: Up to 256GB
  • Colors: Black, Red


  • Size: 6.28-Inch FHD+
  • Resolution: 2280*1080
  • Material: Super AMOLED
  • Touch Screen: Capacitive multi-touch

Digital Camera

  • Pixel: Front: 2x12MP (24 million photographic units); Rear: 2x12MP (24 million photographic units) + 5MP
  • Auto Focus: Available on main rear camera. Not available on front camera or secondary rear camera.
  • Aperture: F1.8 (rear 2L8) / F2.4 (rear 4E8) / F2.0 (front 2L8)
  • Flash: Front sceen flash / rear flash
  • Photography Modes: Front: Live Photo / Face Beauty / Backlight / Portrait Mode Bokeh (single camera) / Panorama / AR Stickers Rear: Slow Motion / Backlight / Live Photo / Portrait Mode Bokeh (dual cameras) / Panorama / Ultra HD / PPT Mode / Professional Mode / Time Lapse / Face Beauty / AR Stickers


  • 2G GSM: 850/900/1800/1900MHz
  • 3G WCDMA: 850/900/2100MHz
  • 4G TDD-LTEB: 38/B39/B40/B41
  • 4G FDD-LTE: B1/B3/B5/B7/B8/B28
  • 4G+ TDD-LTE: B40/B41
  • 4G+ FDD-LTE: B3/B7/B3+B7, B7+B8, B3+B28

Physical Specifications

  • Shape: Bar
  • Dimension (length x width x height): 154.45*74.78*7.37mm
  • Gift Box (length x width x height): Available at the trial production stage
  • Weight: 156.2g
  • Battery: 3200mAh (typical capacity)


  • Video Playing: MP4, 3GP, AVI
  • Video Recording: MP4
  • Audio & Speaker
  • MP3 Ringtone: Supported
  • Recording: Supported
  • Hi-Fi: AK4376A


  • Supporting Wi-Fi Bands: Dual-band Wi-Fi (2X2MIMO), IEEE 802.11 a/b/g/n/ac
  • Bluetooth: Supporting Bluetooth 5.0
  • USB: USB 2.0
  • GPS Location: Supported
  • OTG: Supported

Built-in Applications

  • Social: Facebook, WhatsApp, LINE, Google Duo, Gmail
  • Movie, TV & Music: YouTube, Google Play Music
  • Frequently Used Applications: WPS Office, UC Browser, Google Play Store, Google Photos, Google Apps, Cloud Drive, Chrome
  • News & Entertainment: Newspoint, Google Play Movie
  • Lifestyle: Amazon, Lazada, Flipkart, Maps

More Function Connectivity

  • Accelerometer: Supported
  • Light Sensor: Supported
  • Proximity Sensor: Supported
  • Digital Compass: Supported
  • Gyroscope: Supported
  • Hands-Free Calls: Supported
  • Cloud Service: Supported
  • Test Message Capacity: No limit, sharing memory space.
  • Contact Book Capacity: No limit, sharing memory space.