Vivo X21 PD1728F Firmware Flash File | Restore Stock Bootloader & Bypass Lock

Facing issues like black screen after flash, fastboot stuck, dm-verity verification failed, or touch not working on your Vivo PD1728F? This guide provides the tested official firmware flash file and step-by-step instructions to fix these issues using the Qualcomm QFIL Flash Tool.

🛠️ Common Problems Solved by Flashing PD1728F Stock ROM

• Vivo PD1728F stuck on logo / fastboot loop
• Dead boot or no power (Qualcomm EDL repair)
• Touch not working after firmware update
• Black screen issue after custom ROM or flashing
• Boot.img and vbmeta patch errors fixed

⚠️ Important Instructions Before Flashing

Always use the exact firmware version for your Vivo PD1728F model. Mismatching versions may brick your phone. Fully charge the device and take a backup. Flashing will erase all data permanently.

📋 How to Flash Vivo PD1728F using QFIL Tool (Qualcomm)

1. Install Qualcomm USB Drivers on your computer (link below).
2. Download and extract the PD1728F Firmware using WinRAR or 7-Zip.
3. Open the QFIL Tool from the QPST suite.
4. Select Flat Build from the interface.
5. Click on Browse and load the file: prog_emmc_firehose_*.mbn from the firmware folder.
6. Click Load XML and select rawprogram.xml first, then patch.xml.
7. Put your device into EDL Mode using the test point method.
8. Connect the device via USB. Check that Qualcomm HS-USB QDLoader appears in Device Manager.
9. Click on Download in QFIL to begin the flashing process.

✅ After successful flashing, your phone will reboot with official software restored.

📦 Download Vivo PD1728F Firmware & Tools

File Name	Download
📁 Firmware: PD1728F_EX_A_6.7.7 (Official)	Download
🛠️ QFIL Flash Tool (QPST Suite)	Download
🔌 Qualcomm USB Drivers (Windows)	Download

💡 Flashing Tips & FAQ for Vivo PD1728F

• Q: Does flashing rom remove FRP lock?
  A: No, it only restores stock ROM. FRP requires a separate solution.
• Q: Vivo X21 not detected in QFIL?
  A: Use EDL test point and verify Qualcomm drivers are properly installed.
• Q: Can I flash without data loss?
  A: No, flashing wipes everything. Backup before you begin.