Oppo A71 CPH1717 Download Not Completed Error Fix | Oppo_Custom.bin Solution

Facing “Download Not Completed” Error on Oppo A71 CPH1717?

If you’re flashing your Oppo A71 (Model: CPH1717) and suddenly get the “Download not completed” error in DownloadTool, don’t worry — this is a common issue caused by a missing or mismatched Oppo_Custom.bin file. This guide will walk you through the exact fix so you can successfully flash your firmware without interruptions.

Why This Error Happens

When flashing Oppo devices using the official SPFlash Tool, the Oppo_Custom.bin file acts as a configuration or region-specific file. If this file is corrupted, missing, or incompatible with your firmware package, the tool stops midway — showing the “Download not completed” message.

Common reasons include:

• Wrong or mismatched firmware version (wrong region build).
• Missing Oppo_Custom.bin in firmware folder.
• Incomplete or interrupted download of the firmware.
• Using older or modified SPFlashTool versions.

Step-by-Step Fix for Oppo_Custom.bin Error

Step 1: Verify Your Firmware Package

Make sure you’re using the official Oppo A71 CPH1717 stock ROM. Avoid mixed or edited firmware files. You can download the tested official firmware from MobiFirms.com.

Step 2: Replace or Add Oppo_Custom.bin File

1. Open your extracted firmware folder.
2. Check if the file Oppo_Custom.bin exists.
3. If missing or corrupted, download the correct Oppo_Custom.bin for your model and region (available on MobiFirms).
4. Place it in the same folder where the .ofp or firmware image files are located.

Step 3: Use the Correct Flash Download Tool

• Use the latest version of MSMDownloadTool compatible with your Oppo model.
• Run it as Administrator.
• Make sure the tool detects your device in Brom Mode (MTK Port).

Step 4: Start Flashing Again

• Click Start on the Download Tool.
• Wait for 100% completion.
• The phone will reboot automatically after a successful flash.

If the issue persists, double-check that your firmware build and Oppo_Custom.bin file are from the same region variant.

Tested Solution Example

For example, if you’re flashing Oppo A71 CPH1717EX_11_A.51, ensure that your Oppo_Custom.bin file also matches EX_11_A.51 build. A mismatch with A.45 or A.33 can trigger the same download error again.

Pro Tip from Technicians

Many repair engineers prefer using the full stock ROM with correct Oppo_Custom.bin instead of patching the missing file. This reduces flashing errors by 90%. Always use tested firmware packages from trusted sources like MobiFirms to save time and prevent soft-bricks.

Final Advice

Once your flash completes, perform a factory reset from recovery mode for a clean boot. This ensures system stability after firmware replacement.

If you still face issues, you can download the fixed firmware + Oppo_Custom.bin file directly from MobiFirms to solve it permanently.

👉 Download Oppo A71 CPH1717 Fixed Firmware Now ›