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.

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.
Is there an Android 9 ROM file?