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Vivo X21 UD (2018) review

Android OS v8.1 (Oreo)
Qualcomm Snapdragon 660 MSM8976 Plus
Adreno 512
6 GB / 64 GB
6.28 inches (1080 x 2280 px)
12 + 5 MP, 4032 x 3024 px, autofocus, optical image stabilization

Vivo announced the launch of the X21 UD smartphone in 2018. The manufacturer is offering the Vivo X21 UD phone with 6.28 inches display, Qualcomm Snapdragon 660 MSM8976 Plus chipset, 6 GB of RAM and 64 GB of internal storage.

The Vivo X21 UD comes with Android OS v8.1 (Oreo) out of the box, and a Li-Po 3200 mAh, non-removable battery. The 6.28 inches phone comes with AMOLED display (1080 x 2280 px). The AMOLED is a display technology and stands for Active Matrix Organic Light Emitting Diodes, it is a type of OLED display and is used in smartphones.

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Vivo X21 UD specifications

BrandVivo
NameX21 UD
ModelX21UD
Release date2018

Body

The weight of Vivo X21 UD is about 5.5 oz with battery, which is average compared to most of the smartphones with same size. The dimensions of this Vivo phone are average (6.08 x 2.94 x 0.29 inches).

Weight5.5 oz
Dimensions6.08 x 2.94 x 0.29 inches
Colorsblack, red, white
SIM typeNano SIM

System

The Vivo X21 UD comes with Android OS v8.1 (Oreo) out of the box, but it is upgradable to the next OS.

OS versionAndroid OS v8.1 (Oreo)
SoCQualcomm Snapdragon 660 MSM8976 Plus
CPUQuad-core, Dual-core 2.2 GHz Kryo, Dual-core 1.84 GHz Kryo
GPUAdreno 512

Display

The size of X21 UD screen is measured diagonally, from corner to corner. The 6.28 inches Super AMOLED display of Vivo X21 UD with 1080 x 2280 px resolution is multitouch capable.

Display typeSuper AMOLED
Screen size6.28 inches
Resolution1080 x 2280 px
Multitouch supportyes

Memory

The internal memory of Vivo X21 UD (6 GB) cannot be expanded, but the internal storage (64 GB) can be expanded with a compatible microSD card.

RAM6 GB
Internal storage64 GB
Memory card slotmicroSD

Camera

The camera of the X21 UD is equipped with autofocus. An autofocus (or AF) optical system uses a sensor, a control system and a motor to focus on an automatically or manually selected point or area. Very few Android cameras come without autofocus. The main camera of X21 UD has optical image stabilization (OIS) to counteract camera shake. Optical image stabilization is a must for anyone shooting without a tripod with a long lens or in low light conditions.

Selfie camera12 MP
Main camera12 + 5 MP, 4032 x 3024 px, autofocus, optical image stabilization
FlashLED

Connectivity

The Vivo X21 UD supports 2G, 3G and 4G/LTE networks. This phone has a built-in GPS. GPS is a highly accurate navigation system using signals from satellites to determine a location on the Earth's surface, irrespective of weather conditions. Most phones have a GPS unit on board. The X21 UD phone doesn't have built-in FM radio.

GSM 2G bands850 / 900 / 1800 / 1900
Network coverage2G / 3G / 4G
Wi-FiWi-Fi 802.11 a/b/g/n/ac
Bluetoothv5.0, A2DP
GPSA-GPS, GLONASS
NFCno
FM radiono
USBmicroUSB 2.0
Headphone3.5 mm jack

Battery

The Li-Po 3200 mAh, non-removable battery gives the smartphone a good battery backup. The lithium polymer (Li-Po) battery is a thin, light-weight, rechargeable battery. No periodic discharge is needed and charging can be done at random. The battery of X21 UD isn't removable without voiding the warranty.

TypeLi-Po 3200 mAh, non-removable

Features

Smartphones today come with a wealth of sensors to facilitate a better user experience. The accelerometer is a sensor that measures the tilting motion and orientation of the phone. The X21 UD phone has a fingerprint scanner. This sensor identifies and authenticates the fingerprints of an individual in order to grant or deny access to a smartphone. This Vivo phones comes with proximity sensor. This proximity sensor detects how close the phone is to an outside object, such as your ear. The Dual SIM capability of Vivo X21 UD phone is ideal for businesses wishing to provide staff with a mobile device that can offer separate numbers and bills for both personal and business use. This smartphone supports fast charging technology, which comes in handy when you need quick juice on your device.

Sensorsaccelerometer, compass, fingerprint, gyroscope, light, proximity
SpecialsDual SIM, Fast charging
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The specifications above are based on the official data published by the manufacturer, but we also take user reviews into consideration. If you found an error or something lacking in the specifications above for the Vivo X21 UD, then don’t hesitate and signal the problem to us.

Vivo X21 UD pictures

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