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Ensure the Qualcomm 9008 Drivers are installed on your PC. Without these, QFIL will not detect the device.
The Oppo A3S (CPH1803) is powered by the chipset. Because it uses a Qualcomm processor, it features a low-level diagnostic mode known as EDL (Emergency Download) Mode or Qualcomm HS-USB QDLoader 9008.
Open QFIL and ensure the phone is detected as "Qualcomm HS-USB QDLoader 9008." Select .
To help tailor this process to your specific situation, let me know:
To flash the Oppo A3s (CPH1803) Go to product viewer dialog for this item.
In some hardware-level cases, disassembling the device to short the test points
