Enable Diagnostics Mode Port Oppo Neo 9 A37F
- Install Qualcomm Drivers.
- Install Windows Drivers for Android Debug Bridge.
- 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 Successfully message should appear.
- Dial Number *#801#.
- Enable Engineer Mode Toggle, Serial, Full-port switch, Rndis, diag switch, rmnet_bam switch.
- Pop up message installing driver will appear, let the driver installing process to complete.
- Check Ports on Windows Device Manager should be detected Qualcomm HS-USB Diagnostics 9091.
- In the next step, you can fix IMEI, Baseband, backup or restore QCN files.