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vivo X21 UD

vivo X21 UD
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SKU: Phone Mobs-1160
Brand: vivo
Category: Mobile Phone

Our Rating

The overall rating is based on review by our experts

  • Camera 7 / 10
  • Performance 7 / 10
  • Battery 7 / 10

vivo X21 UD smartphone was launched on March, 2018. The Mobile Phone is powered by a Octa-core (4×2.2 GHz Kryo 260 Gold & 4×1.8 GHz Kryo 260 Silver) processor with Qualcomm SDM660 Snapdragon 660 (14 nm) chipset, as for graphics it possesses Adreno 512 GPU. It comes in 128GB 6GB RAM internal memory. The Cellphone runs on Android 8.1 (Oreo), Funtouch 4 operating system and is powered by a 3200mAh of Li-Ion battery.

The phone comes with a 6.28″ desplay size, Super AMOLED capacitive touchscreen with a resolution of 1080×2280 pixels. It has a display aspect ratio of 19:09 and ~85.2% of screen ratio with 16M of display colors.

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vivo X21 UD Camera

In the Camera department, the vivo X21 UD on the rear packs dual Lens of 12 MP and 5 MP. The rear camera setup has LED flash, HDR, panorama features.

The front camera sports single Lens of 12 MP for selfies, with features

Hardware and Software

The vivo X21 UD runs on Android 8.1 (Oreo), Funtouch 4 operating system and packs  128GB 6GB RAM of inbuilt storage that can be expanded via microSDXC (uses shared SIM slot). The vivo X21 UD is a Hybrid Dual SIM (Nano-SIM, dual stand-by). The smartphone measures 154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in) (height x width x thickness) and weighs 156.2g (5.50 oz). It was launched in Black, Ruby Red colors.

Phone Connectivity

Connectivity options on the vivo X21 UD include Wi-Fi, dual-band, Wi-Fi Direct, hotspot, A-GPS, Glonass, Bluetooth 5.0, A2DP, LE, microUSB 2.0, USB On-The-Go, while it support GSM, CDMA, HSPA, LTE with network speed of HSPA 42.2, 5.76 Mbps, LTE-A (2CA) Cat6 300, 50 Mbps. Sensors on the phone include Fingerprint (under display, optical), accelerometer, proximity, compass.

 vivo X21 UD Prices.

As of March, 2018, below is the price in Nigeria, USA, Europe and Britain

Price in Nigeria About NGN 269,000
Price in United States About USD 655
Price in British Pound About GBP 471
Price in Europe About EUR 550


vivo X21 UD features dual lens 12 MP and 5 MP Back Camera, Android 8.1 (Oreo), Funtouch 4 OS with 128GB 6GB RAM power by 3200mAh battery


Flashing and installation of vivo X21 UD firmware stock ROM can help you solve many problem. If your X21 UD phone is malfunctioning, dead, or infected with virus follow this steps by steps installation guide to Download vivo X21 UD firmware and Flash File



2G Network GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G Network HSDPA 850 / 900 / 1900 / 2100
4G Network 1, 2, 3, 5, 8, 34, 38, 39, 40, 41
Speed HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps
Technology GSM / CDMA / HSPA / LTE


Announced March, 2018
Status March, 2018

Main Camera

Real Camera Type dual
Rear Sensor(s) 12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF

5 MP, f/2.4, (depth)
Rear Video 1080p@30fps
Rear Features LED flash, HDR, panorama

Selfie Camera

Selfie Camera Type single
Selfie Sensor(s) 12 MP, f/2.0, (wide), 1/2.8", 1.28µm
Selfie Video 1080p@30fps


Memory (RAM) 128GB 6GB RAM
Card slot microSDXC (uses shared SIM slot)


SIM Hybrid Dual SIM (Nano-SIM, dual stand-by)
Dimensions 154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in)
Weight 156.2g (5.50 oz)
Build Glass front (Gorilla Glass 3), aluminum back, aluminum frame


WLAN Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot
USB microUSB 2.0, USB On-The-Go
GPS A-GPS, Glonass
Bluetooth 5.0, A2DP, LE
Radio FM radio


Resolution 1080 x 2280 pixels, 19:9 ratio (~402 ppi density)
Type Super AMOLED capacitive touchscreen, 16M colors
Size 6.28 inches, 98.4 cm2 (~85.2% screen-to-body ratio)


Sensors Fingerprint (under display, optical), accelerometer, proximity, compass


Colors Black, Ruby Red
Price $655 / £471 / €550 / ₦269,000
Models X21UD A


CPU Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)
Chipset Qualcomm SDM660 Snapdragon 660 (14 nm)
Operating System Android 8.1 (Oreo), Funtouch 4
GPU Adreno 512


Loudspeaker stereo speakers
3.5mm jack Yes


Capacity 3200mAh
Battery Type Li-Ion
Placement Non-removable
Charging Fast charging 18W


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