uses a Qualcomm Snapdragon 450 chipset, you typically need professional service tools for "offline" flashing or dead recovery:
The is a powerful tool for repairing and restoring your device. Whether you are using the simple OTA recovery method for a password reset or you are deep into hardware repairs with EMMC dump files to fix a dead boot, this guide provides the steps you need to follow. Always start with the official download sources and progress to advanced methods only if necessary. Proceed with caution, and your OPPO A3s will be back in working order in no time. oppo a3s cph1803 flash file
Re-install the Qualcomm drivers. Try switching to a USB 2.0 port instead of a USB 3.0 port, or swap the USB cable. uses a Qualcomm Snapdragon 450 chipset, you typically
