Vivo

Vivo X21 UD: Pros and Cons

Android OS v8.1 (Oreo)
Qualcomm Snapdragon 660 MSM8976 Plus
Adreno 512
6 GB / 64 GB
6.28 inch (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 this smartphone with 6.28 inch Super AMOLED display, Qualcomm Snapdragon 660 MSM8976 Plus SoC, and 6 GB of RAM. It comes with Android OS v8.1 (Oreo) out of the box, and a Li-Po 3200 mAh, non-removable battery. The 6.28 inch phone comes with a high resolution AMOLED display (1080 x 2280 px). The X21 UD has a multi-camera setup. The lens offers versatility. It lets you capture a wide range of subjects and scenes from different perspectives. Is this phone a good value for its price? My review aims to answer that question by the end.

Table of Contents

This article shares our personal experiences and thoughts about using the Vivo X21 UD smartphone. We hope to offer helpful insights to others interested in this device. The specifications below are from the official manufacturer data, but we also consider user reviews. If you've seen any mistakes or things missing in these specifications, please let us know.

Vivo X21 UD / 1

Vivo X21 UD specifications

BrandVivo
NameX21 UD
ModelX21UD
Release date2018

Weight, dimensions, colors

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

The weight of Vivo X21 UD is about 5.5 oz with battery. This is average for smartphones of the same size. Smartphones use a Nano SIM as a small chipcard for a subscriber identity module (SIM).

System, chipset, performance

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

The Vivo X21 UD comes with Android OS v8.1 (Oreo) out of the box. Android is a mobile operating system. Google built it using a modified version of the Linux kernel. They also used other open-source software. The mid-range CPU can deliver fast, efficient performance for many tasks. Qualcomm's Snapdragon processors work with Adreno GPUs. The processors are designed for the GPUs.

Display type, size, resolution

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

The 6.28 inch phone comes with AMOLED display. Smartphones use the AMOLED, which is a type of OLED display. The 6.28 inch display should be big enough for your needs. It will make viewing comfortable. This is true whether you're reading, browsing, or watching. The size of the screen is measured diagonally, from corner to corner.

Memory, storage

RAM6 GB
Internal storage64 GB
Memory card slotmicroSD

The Vivo X21 UD comes with 6 GB of RAM, which is considered to be sufficient for most users' needs. More RAM lets you keep more apps and processes open in the background. This keeps the device from slowing down. 64 GB of storage is usually seen as good for a smartphone. It should be enough for most users. You can expand the internal storage (64 GB) with a compatible microSD card.

Cameras, flash

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

Using multiple cameras has advantages. They provide more versatility and creative possibilities. They let you capture a wider range of subjects. The main camera of X21 UD has optical image stabilization (OIS). It counters camera shake.

Connectivity, network, wireless

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

The 4G provides faster data transfer speeds compared to previous generations. This phone like all modern smartphones, is capable of connecting to Wi-Fi networks. The X21 UD smartphone is capable of connecting to Bluetooth devices. This phone has a built-in GPS. The phone isn't NFC (Near Field Communication) capable. NFC is not essential for basic phone functionality, but it can be useful. The 3.5 mm headphone jack allows you to connect wired headphones or earphones to the device.

Battery type, capacity, charger

TypeLi-Po 3200 mAh, non-removable

The Li-Po 3200 mAh, non-removable battery gives the smartphone a good battery backup. The lithium polymer (Li-Po) battery is a light-weight, rechargeable battery. The battery of X21 UD isn't removable without voiding the warranty.

Features, sensors, specials

Sensorsaccelerometer, compass, fingerprint, gyroscope, light, proximity
SpecialsDual SIM, Fast charging

Today, smartphones come with many sensors. They help make the user experience better. The accelerometer is a sensor. It measures the tilting motion and orientation of the phone. The X21 UD phone has a fingerprint scanner. The light sensor detects the level of light in the environment. Dual SIM is great for businesses. They want to give staff a device with separate numbers and bills for personal and business use. The fast charging technology comes in handy when you need quick juice on your device.

Verdict, pros and cons

Every phone has its strengths and weaknesses, and this Vivo phone is no exception. As with any device, there are aspects that shine and others that fall short. By examining both sides, we can paint a complete picture of what this phone has to offer. Let's explore its standout features and areas for improvement. Remember, this is just my opinion, and yours might be different.

Pros

  • Super AMOLED display
  • appropriate screen size
  • adequate memory
  • microSD slot
  • multicamera setup
  • optical image stabilization (OIS)
  • Dual SIM support

Cons

  • no 5G support
  • no NFC feature
  • no Type-C USB port
  • low-capacity battery
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Lucas Bradley I'm Lucas Bradley, the founder of the Phone42.com site. I love technology, especially smartphones, and I've been working with tech stuff for more than 20 years. This means I've seen a lot of changes and have learned a bunch about what makes a good phone. On Phone42.com, I look at all kinds of phones. They can be from big, well-known companies or new ones trying to make their mark. I want to help people understand what's new and cool in the world of smartphones, in a way that's easy to get.
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