Oppo A8 PDBM00 Download Not Completed Error Fix | Oppo_Custom.bin Solution

Introduction

If you’re flashing an Oppo A8 PDBM00 (MTK) and encounter the dreaded “Download not completed” error, you’re not alone. Many technicians face this issue while using tools like SP Flash Tool or MTK Flash Tool when trying to install the official firmware. The root cause often lies in a missing or mismatched Oppo_Custom.bin file during the flashing process.

In this guide, we’ll explain why this happens and how to fix it permanently using the right firmware and Oppo_Custom.bin file.

Why the Error Happens

This error typically appears due to one or more of the following reasons:

• Missing or corrupted Oppo_Custom.bin in firmware package.
• Using incompatible firmware version (different build number).
• Incomplete scatter file structure in the ROM folder.
• SP Flash Tool checksum mismatch due to DA file issues.

When the tool detects a problem with the Oppo_Custom partition, it stops the process midway and throws the “Download not completed” message.

Step-by-Step Fix for Oppo A8 PDBM00

Step 1: Prepare Required Files

You’ll need:

Step 2: Extract and Verify Firmware

Extract the downloaded firmware and ensure all partitions are present:

• preloader.bin
• lk.bin
• boot.img
• system.img
• oppo_custom.bin

If Oppo_Custom.bin is missing, download the fixed version from MobiFirms → Fixed Firmware section.

Step 3: Load Scatter File in SP Flash Tool

1. Open SP Flash Tool.
2. Click on “Choose” under Scatter-loading file and select MT6765_Android_scatter.txt.
3. Make sure Oppo_Custom is checked and points to the correct .bin file.

Step 4: Start Flashing

1. Click Download.
2. Power off the device and connect it while holding Volume Up.
3. Wait until the flashing completes successfully.

If the process finishes without interruption, your device should boot normally.

Pro Tip:

Always use firmware versions matching the same build number as your device. For Oppo MTK models, using mismatched firmware leads to partition signature mismatch errors. Also, disable “Checksum Verification” in SP Flash Tool when flashing custom/fixed files to avoid unnecessary validation failures.

Conclusion

By replacing the missing or corrupted Oppo_Custom.bin and flashing with compatible firmware, you can easily fix the Oppo A8 PDBM00 download not completed error.

To get 100% tested official firmware, flash tools, and fixed files for Oppo and other MTK devices, visit MobiFirms.com.

Download official Oppo A8 firmware and fixed Oppo_Custom.bin file now from MobiFirms.com and bring your device back to life!