Oppo F5 CPH1723 Download Not Completed Fix | Oppo_Custom.bin File Solution

If you’re flashing the Oppo F5 CPH1723 and facing the “Download not completed” error in SP Flash Tool or MSM Download Tool, you’re not alone. This issue usually appears during firmware flashing on MTK-based Oppo devices when the Oppo_Custom.bin file is missing, corrupted, or mismatched with the firmware version.

In this guide, we’ll explain the cause of this error and show you the tested fix to successfully complete the firmware download without any interruption.

Why the “Download Not Completed” Error Happens

This error generally occurs due to one of the following reasons:

When the tool cannot verify the Oppo_Custom.bin file during flashing, it stops with the “Download not completed” error message.

Step-by-Step Fix for Oppo_Custom.bin Error

Step 1: Use a Complete, Tested Firmware

• Download the official Oppo F5 CPH1723 firmware from a trusted source like MobiFirms.com.
• Make sure the firmware includes the Oppo_Custom.bin file in the “Firmware” or “Scatter” folder.
• Avoid mixing files from different builds (example: CPH1723EX_11_A.27 vs A.31).

Step 2: Flash Using Correct Tool & DA File

• Use the latest SP Flash Tool or MTK Download Tool.
• Load the auth file, DA file, and scatter file properly.
• Uncheck “userdata” and “cache” partitions for faster flashing (optional).

Step 3: Fix Corrupted Oppo_Custom.bin

If your firmware lacks or has a damaged custom file:

1. Get a working Oppo_Custom.bin from another verified firmware.
2. Place it in the same directory as your scatter file.
3. Re-flash using “Download Only” mode.

Step 4: Use Auth Bypass for Secure Boot (If Needed)

For newer security patches, you may need MTK Auth Bypass Tool, MTK META Utility, or SP Flash Tool Auth Bypass.

• Use “Disable SLA/DAA” option in MTK META Utility before flashing.
• Always backup NVRAM and IMEI before any operation.

Common Mistakes to Avoid

• Don’t flash using mixed firmware regions (India vs Indonesia builds).
• Never rename or edit the Oppo_Custom.bin manually.
• Always verify checksum to ensure file integrity.

Final Words

Fixing the “Download not completed” error on Oppo F5 CPH1723 is simple once you understand the cause — usually a missing or incompatible Oppo_Custom.bin file. Using complete and verified firmware ensures smooth flashing and device recovery.

👉 Download the 100% tested Oppo F5 CPH1723 firmware and Oppo_Custom.bin fix file now on MobiFirms.com to restore your phone safely and quickly.