Vivo X21 PD1728F Firmware Flash File: PD1728F_EX_A_6.70.8

New Updated on May 16, 2021: Today Vivo started rolling the latest security patch version for the Vivo X21 which carries build number PD1728F_EX_A_6.70.8. We...

Mohammed Huwais

Last updated on May 11, 2026

Mohammed Huwais

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I started my career as a blogger in 2014 and also worked on an Android niche platform to gain extra income. I cover the topic on How to guides, software updates, Custom ROM updates and also product review. I'm 24 years old, completed MBA (Master of Business Administration) from Sikkim Manipal University.

New Updated on May 16, 2021: Today Vivo started rolling the latest security patch version for the Vivo X21 which carries build number PD1728F_EX_A_6.70.8. We have shared the download link to firmware along with the installation guide.

On this page, we will guide you on how to download and install the official firmware file on Vivo X21 PD1728F. This tutorial is easy to follow. Vivo X21 is powered by a Qualcomm Snapdragon 660 AIE processor powered by Android 8.1 Oreo.

If you are someone who is facing software issues such as WiFi or Bluetooth issues, lag, boot loop, or hard brick, you can fix the device by following this tutorial. By using the firmware file, you can bypass FRP lock, pattern lock, downgrade, or upgrade, and you can fix most of the software glitches by flashing the stock firmware.

How To Install Official Stock ROM On Vivo X21

Advantages of Installing Stock ROM

Here are some of the advantages of installing stock ROM on your Vivo X21:

If your device is dead, you can unbrick using Stock ROM file

You can fix or repair the IMEI on your device using DB files from Stock ROM

Remove any malware or Adwares from Vivo X21

You can fix the boot loop issue on Vivo X21

Fix Unfortunately, the app has stopped error on Vivo X21

Fix Network related issue

Patch Boot image to Root using Magisk: Mediatek Guide or Spreadtrum Guide

You can unroot Vivo X21

To Reset or Remove FRP on your device: Mediatek FRP Guide or Spreadtrum FRP Guide

Restore Vivo X21 back to Factory State

Firmware Details

Device Name: Vivo X21 PD1728F

Gapps File: Included

Tool Supported: QFil Flash Tool

Processor: Qualcomm Snapdragon 660 AIE

Android OS: 8.1 Oreo

Steps to Flash Firmware File On Vivo X21 PD1728F

Now, before we get straight to the Steps to install the firmware flash file On Vivo X21 PD1728F, let us take a look at some of the prerequisites.

Pre-Requisites:

This will work only on Vivo X21 PD1728F

To flash a firmware file on Vivo X21, You need a Laptop or PC

Charge your phone to at least 70%

Download Vivo USB Drivers | Qualcomm USB Drivers

Take a full backup of your device just in case if you need it later

Download QFIL Flash Tool and extract it on your computer

Download Flash Files

Download File

Description

Download

PD1728F_EX_A_6.70.8

Download

PD1728F_EX_A_6.70.6

Download

PD1728F_EX_A_6.10.2

Download

PD1728F_EX_A_6.9.4

Download

PD1728F_EX_A_6.8.12

Download

PD1728F_EX_A_6.8.9

Download

PD1728F_EX_A_6.8.5

Download

PD1728_A_1.20.17 – CN

Download

PD1728F_EX_A_1.13.2

Download

PD1728_A_1.18.36

Download

PD1728F_EX_A_1.7.10_vivo_qcom_LA

Download

PD1728F_EX_A_1.7.11-update-full_1528073989.zip

Download

PD1728F_EX_A_1.6.18_14042018_QFIL.zip

Instructions to Install:

You can follow any method given below.

Method 1: Via Recovery

First, you can try the official method to install the OTA stock ROM update via Vivo device recovery. Follow the guide link given below to install the OTA update on vivo device.

Guide to Install Vivo Firmware on any Vivo smartphone

Method 2: Install via QFIL Tool:

If you are installing and Using Qualcomm Flash Image Loader (QFIL) on your PC/Laptop running Windows, you must have the Supported Qualcomm Supported Drivers installed. To Download Click here and Install the Qualcomm USB Drivers. (Skip this step if you already have drivers installed)
Now Download the QFIL zip file and Extract it anywhere on your computer. (We recommend to extract it on your PC/Laptop desktop. Once extracted, open the folder.
Now in the QFIL Folder, Click the QFIL application file and Open it.
Once you open it, you will see the following screen on your computer
Turn your Phone off using the power button
Once your Phone is switched off, Now Hold the Volume UP button and try to connect your phone to PC/Laptop using USB Cable
Your Phone model will be displayed on your PC
Now Click the Browse option to select the downloaded ROM file on QFIL application
Now browse and Select the ROM you downloaded from the extracted folder
Once it is loaded, Click on Load XML and select RawProgram Path as rawprogram0.xml file located in ROM Folder
Select Patch Path as patch0.xml. Both the files are located in ROM Folder.
Now Click The Download button to start the Installation process.
Installation Process will take almost few seconds or a minute to complete. Be Patient! Don’t disconnect your phone from computer.
Once it is done, You will get a message saying Download Succeeded. Now Unplug by removing USB Cable from Computer
To reboot your Vivo X21.
That’s it ! You have completed the installation process!

I hope you installed the Stock ROM on Vivo X21 successfully, Now please rate this website with your comment. We always welcome feedbacks and improvements.

Vivo X21 PD1728F Firmware Flash File: PD1728F_EX_A_6.70.8

Advantages of Installing Stock ROM

Firmware Details

Steps to Flash Firmware File On Vivo X21 PD1728F

Pre-Requisites:

Download Flash Files

Instructions to Install:

Method 1: Via Recovery

Method 2: Install via QFIL Tool:

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