Avoid random Google Drive links. Recommended sources:
Bad sectors on eMMC chip. Fix: This is hardware failure. Replace the motherboard or use EMCP reballing . oppo a71 cph1801 qfil flash file exclusive
🧠 The exclusive QFil file often comes from a factory test point dump – meaning it has lower anti-rollback index (typically 1), so you can downgrade ColorOS versions freely. Avoid random Google Drive links
Once opened, look at the top of the utility. It should status-check your connection and display Qualcomm HS-USB QDLoader 9008 (COMxx) . Under , click and select Flat Build . click and select Flat Build .