Realme 6i RMX2040 Firmware Download Not Completed Fix | Oppo_Custom.bin Error Solution

If you’re flashing your Realme 6i RMX2040 and the download not completed error appears—especially showing “Oppo_Custom.bin” file failure—you’re not alone. This issue is common among MTK-based Realme devices during firmware flashing with tools like SP Flash Tool or Realme Flash Tool.

In this guide, we’ll explain why the Oppo_Custom.bin error occurs and how to fix it safely without bricking your phone.

Why the “Oppo_Custom.bin” Error Happens

This error usually appears when:

• The firmware is incomplete or corrupted.
• Wrong region or build number firmware is used.
• Scatter file mismatch (wrong partition map).
• Secure Boot (DA) authentication fails during flashing.

When this happens, the flashing process stops midway—showing “Download not completed” or “Oppo_Custom.bin failed” on your tool’s log.

Step-by-Step Fix for Realme 6i RMX2040

Step 1: Use Correct & Tested Firmware

Download the official Realme 6i RMX2040 stock ROM from trusted sources like MobiFirms.com. Make sure the firmware name matches your device region and version (e.g., RMX2040_11_A.45).

💡 Pro Tip: Always verify file integrity (MD5/SHA) before flashing to avoid data corruption.

Step 2: Replace or Skip the Oppo_Custom.bin File

If the tool hangs on Oppo_Custom.bin, try this method:

1. Extract your firmware folder.
2. Locate and delete or rename the Oppo_Custom.bin file.
3. Open scatter.txt in a text editor.
4. Search for “Oppo_Custom” entry and set is_download: false or remove that section.
5. Save and flash again.

This skips the faulty partition, allowing the flashing process to complete.

Step 3: Use Authorized DA File (MTK Secure Boot)

For newer Realme devices, use an auth file (DA + auth) combination:

Load both files in SP Flash Tool or MTK Client, then start flashing.

Step 4: Format + Download Option (Optional)

If error persists, try Format + Download option in SP Flash Tool—but use with caution.

⚠️ Warning: This will erase IMEI and calibration data. Always back up NVRAM or use MauiMeta for IMEI restore.

Final Check & Success Confirmation

Once flashing completes successfully, your Realme 6i should boot normally.
If it’s stuck on the logo, perform a factory reset in recovery mode.

Bonus Tip:

If you repair phones professionally, keep a pre-tested fixed firmware that already skips faulty partitions like Oppo_Custom.bin. It saves time and avoids bootloop risks.

Download Realme 6i RMX2040 Firmware

➡️ Click here to Download Official Realme 6i RMX2040 Stock ROM
(100% Tested | Includes SP Flash Tool + DA File)

Tools You’ll Need

• SP Flash Tool v5 or v6
• MTK USB Drivers
• Realme Auth File (for Secure Boot)
• Scatter + DA file
• Official Firmware (from MobiFirms.com)

Conclusion

The Realme 6i RMX2040 Oppo_Custom.bin error is easy to fix with proper firmware and configuration. Always use official stock ROMs and avoid random files from unverified sources.

If you’re still facing issues, comment below on MobiFirms.com or join our Telegram support channel for help.