For hard-bricked devices, professional solutions such as ISP pinout (in-system programming) may be required. This involves connecting directly to the eMMC chip on the motherboard. Seek professional repair services if you lack technical expertise.
Open Device Manager → Ports (COM & LPT). You should see Qualcomm HS-USB QDLoader 9008 (COM3) . oppo a71 cph1801 qfil flash file exclusive
QFIL is the official tool from Qualcomm and is preferred over other methods because: For hard-bricked devices, professional solutions such as ISP
