How to Enable Diagnostics Mode Port Oppo Neo 9 A37F

Oppo A37F device is not connected Diag Port, only detected Android on Device Manager despite updating drivers. What should I do?

Install Qualcomm Drivers. Link
Install Windows Drivers for Android Debug Bridge. Link

Enable USB Debugging and OEM Unlock via Developer Options.
Connect the device to the computer.
Dial Number *#67766776# and you’re taken to the Engineer Mode screen.
Click the Serial Interface/PC Assistant button and the Connect…

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