If your Vivo X520F is stuck on the Vivo logo, not powering on, or showing a black screen after boot, you can fix it by flashing the official Vivo X520F stock ROM. This tested QFIL flash file restores the operating system and resolves all critical firmware errors including dm-verity verification failed and fastboot mode issues.
🔧 Vivo X520F Firmware Fixes the Following Problems
- Stuck on Vivo logo or boot loop issue
- Touch screen not working after update or flash
- dm-verity verification failed error
- OS not loading / black screen issue
- Fastboot mode stuck / Qualcomm EDL recovery needed
- Dead boot repair via QFIL EDL method
📋 Important Notes Before Flashing Vivo X520F
🔋 Charge the battery above 50% to avoid disconnection.
🔍 Always use the correct build version of the Vivo X520F firmware file.
💾 Backup all important files – flashing will erase all phone data permanently.
📥 How to Flash Vivo X520F Firmware via QFIL (Qualcomm EDL Mode)
- Download and install Qualcomm USB Drivers on your Windows PC.
- Extract the downloaded Vivo X520F flash file package using 7-Zip or WinRAR.
- Open the QFIL Tool from the QPST suite.
- Select Flat Build from the QFIL UI.
- Click Browse to load the file:
prog_emmc_firehose_*.mbn. - Click Load XML and select both
rawprogram.xmlandpatch.xml. - Put the Vivo X520F into EDL Mode using test point or ADB command if applicable.
- Make sure the device shows as Qualcomm HS-USB QDLoader 9008 in Device Manager.
- Click Download to start flashing. Do not unplug the device.
- Wait until the status shows “Flash Done” and reboot your device.
✅ After flashing, the device will reboot to the original factory firmware without issues like touch malfunction, logo stuck, or fastboot lock.
📂 Download Vivo X520F Firmware File & Required Tools
| File Description | Download Link |
|---|---|
| 📁 Vivo X520F Stock ROM Firmware (QFIL) | Download Firmware |
| 🛠 QPST + QFIL Tool (Latest Version) | Download Tool |
| 🖥 Qualcomm USB Drivers for Vivo Flashing | Download Drivers |
❓ Frequently Asked Questions (FAQ)
- Q: Can I fix a dead Vivo X520F with this flash file?
A: Yes, this firmware can recover bricked devices through QFIL EDL mode. - Q: Touch not working after flashing – what should I do?
A: Ensure the correct variant is flashed. If still unresolved, reflash using another version from Firmware4Mobile.com. - Q: Will this erase my data?
A: Yes, flashing will format the phone. Backup is strongly advised.