Facing issues like black screen after flash, touch not working, or your Vivo Y91i stuck on fastboot mode? This post contains the official Vivo Y91i firmware and a complete guide to flash it using the SP Flash Tool (MTK-based). Fix software errors, recover from dead boot, and restore your phone to full working condition.
🛠 Common Errors Fixed
- Fix “dm-verity verification failed” error
- Touch not responding after flash
- Black screen or no display issue
- Dead boot repair for Vivo Y91i
- Fastboot loop / stuck on logo
📄 Vivo Y91i Firmware Information
- Model: Vivo Y91i
- Chipset: MediaTek (MTK)
- File Type: Scatter-based Firmware
- Status: Official Stock ROM
⚠️ Important Pre-Flash Checklist
Before starting, confirm that the firmware you are using matches the build version of your Vivo Y91i. Charge the device above 50%. Backup all data because flashing will wipe everything from internal storage.
🔧 How to Flash Vivo Y91i Using SP Flash Tool
- Extract the firmware using 7Zip or WinRAR.
- Install MediaTek USB Drivers on your computer.
- Run the SP Flash Tool (Modified Version).
- Click on the Download Agent section and load the DA file from the Y91i firmware folder.
- In Scatter-loading File, browse to and load the
MT65XX_Android_Scatter.txtfrom firmware folder. - Now power off the device and connect it by holding both volume buttons.
- The MTK Port will appear in your computer's Device Manager.
- Click the green Download button to start flashing.
- Wait until the flashing process completes with a success message.
🧠 Note
All user data will be erased. Make sure to back up your contacts, photos, and apps before proceeding. If flashing fails or you encounter a file mismatch, re-check the scatter file and DA file compatibility.
📥 Download Vivo Y91i Firmware, Tools & Drivers
| File/Tool | Download Link |
|---|---|
| PD1818GF_EX_A_1.71.4 Firmware | Download |
| SP Flash Tool (Modified) | Get Tool |
| Vivo Y91i DA Auth File | Download File |
| MediaTek USB Drivers | Install Drivers |
🖼️ Test Point Image for Y91i
❓ FAQ – Troubleshooting
- Q: Flashing failed with authentication error?
- Use the DA Auth File specific to Vivo Y91i provided above. Flash tool requires it for secure boot.
- Q: Phone not detected after connecting?
- Make sure USB drivers are installed. Try a different cable/port. Use test point if needed.
- Q: Is this firmware for bypassing FRP?
- No, this is for repairing software, not FRP bypass. For FRP, check specific solutions.
Still having trouble flashing or downloading files? Search your model on Firmware4Mobile.com and follow the updated repair instructions. You can also leave a comment under our support videos for help.