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Vivo X21 UD Specs + Pros and Cons Reviews

Vivo X21 UD Specs

Vivo X21 UD Specs

Date Released: 2018, March

DisplayTypeSuper AMOLED capacitive touchscreen, 16M colors
Size6.28 inches, 98.4 cm2 (~85.2% screen-to-body ratio)
Resolution1080 x 2280 pixels (~402 ppi density)
- Funtouch OS 4.0
BodyDimensions154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in)
Weight156.2 g (5.50 oz)
BuildFront glass, aluminum body
SIMHybrid Dual SIM (Nano-SIM, dual stand-by)
CameraPrimaryDual: 12 MP (f/1.8, 1/2.5", 1.4 µm, Dual Pixel PDAF) + 5 MP (f/2.4), phase detection autofocus, LED flash
Secondary12 MP, f/2.0, 1080p
FeaturesGeo-tagging, touch focus, face detection, HDR, panorama
MemoryExternal SlotmicroSD, up to 256 GB (uses SIM 2 slot)
Internal128 GB, 6 GB RAM
NetworkTechnologyGSM / CDMA / HSPA / LTE
BatteryNon-removable Li-Ion 3200 mAh battery
Available ColorBlack, Aurora White, Ruby Red
PlatformOSAndroid 8.1 (Oreo)
ChipsetQualcomm SDM660 Snapdragon 660
CPUOcta-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260)
GPUAdreno 512
SoundAlert TypesVibration; MP3, WAV ringtones
3.5mm JackYes
- 32-bit/192kHz audio
- Active noise cancellation with dedicated mic
COMMSWLANWi-Fi 802.11 a/b/g/n/ac, dual-band, WiFi Direct, hotspot
Bluetooth5.0, A2DP, LE
RadioFM radio
USBmicroUSB 2.0, USB On-The-Go
FeaturesSensorsFingerprint (rear-mounted), accelerometer, proximity, compass
MessagingSMS(threaded view), MMS, Email, Push Mail, IM

Disclaimer: We can not guarantee that the information on this page is 100% correct.

Vivo X21 UD Reviews

Along with the launched of Vivo X21, Vivo introduce another smartphone with the same size and design. It is the Vivo X21 UD or Vivo X21 Under Display version of the Vivo X21 instead releasing the PLUS version of it. Some of the specs of the Vivo X21 UD is almost the same with the Vivo X21 version. It just the UD version has more advanced features than the based version and it is more pricey in the market. The UD version will be expected to be available in the market a few days after the X21 availability.

Vivo X21 UD Specs has a Full-screen SUPER AMOLED display along with its aluminum body materials. It is a Hybrid Dual Nano Sim that supports 4G LTE network. Weighing 156.2g and has the dimension of 154.5 x 74.8 x 7.4 mm or 6.08 x 2.94 x 0.29 inches. It has a 6.28 inches in size and resolution specs of 1080 x 2280 pixels, 19:9 ratio, 402PPi density. A perfect resolution specs for delivering high-quality display.

The smartphone has the Funtouch OS version 4.0 and Android 8.1 Oreo powered by 2.2 Octa-core Snapdragon 660 processor. Along with its 6 GB RAM and 128 GB internal memory. Unlike the X21 model, The UD version has only one variant of memory storage. Aside from the built-in memory storage, it can also expand using the microSD card as an external memory with the capacity up to 256 GB by using the SIM 2 slot. It doesn’t have a dedicated slot for the external memory, so the SIM 2 slot will be its slot if you want to add additional storage.

The same with the based version, it also has a dual rear camera at the back of the device with a quality of 12 MP f/1.8 and 5 MP f/2.4 phase detection autofocus, LED flash as well. For additional camera features, it has the Geo-tagging, touch focus, face detection, HDR, and panorama. While the front camera has 12 MP f/2.0 1080p quality along the 1080p@30fps resolution for the video recording. The camera specs, quality, and even video resolution are the same as the based version of the X21 UD.

Aside from having a dedicated mic for noise cancellation, it has 32-bit/192kHz audio features just like the based version. Along with its connectivity features, WiFi dual-band, Bluetooth 5.0, GPS, FM radio, and micro USB 2.0. “Vivo X21 UD Specs” has also a fingerprint features but not rear-mounted. The fingerprint of it is Under Display meaning its on the screen display. This is the main highlight of the smartphone having a fingerprint scanner on the screen display of the phone.

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This smartphone is also supported by the fast charging battery features along with its Non-removable Li-ion 3200 mAh capacity. The UD version has 3 variant color for the user option: the Black, Aurora White, and Ruby Red. Because of its fingerprint Under display scanner, it makes the phone more pricey in the market with a reasonable pack of awesome features and specs.


  • 6.28 inches with a Full-screen display
  • Super AMOLED display
  • High-resolution quality display
  • 2.2 Octa-core and Snapdragon 660 processor
  • Dual rear camera with high-quality specs
  • 12 MP quality front camera
  • 6 GB RAM with 128 GB internal memory
  • Fingerprint Under display scanner
  • Fast charging supported


  • External memory using SIM 2 slot
  • Non-removable battery



Design look and Feel - 58%
Specs and Performance - 66%
Best Android Phones - 54%



A Hybrid Dual SIM smartphone released by the VIVO company, check it out the new VIVO X21 UD.

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