Are you looking for the Oppo A3s QFIL firmware? This guide provides the direct download link for the Oppo CPH1803 flash file and instructions on how to unbrick your device using the QFIL tool.
Specifically, the CPH1803 version. For certain regions like Indonesia, files with the "EX" suffix are used. Qualcomm Flash Image Loader (QFIL) is the primary utility. The Connection: The device must be put into EDL (Emergency Download) Mode oppo a3s qfil firmware cph1803 qfil flash file link
You have landed on the right page. The only reliable way to resurrect a hard-bricked OPPO A3S is by using the with the correct RawProgram.xml and Patch0.xml files. Are you looking for the Oppo A3s QFIL firmware