The Oppo A71 (CPH1801) is powered by a Qualcomm Snapdragon chipset, making it compatible with the Qualcomm Flash Image Loader (QFIL) tool. The "Exclusive" flash file contains the necessary prog_emmc_firehose_XXXX.mbn file required for flashing Qualcomm devices via EDL mode, as described by EvilicaCell . Benefits of Flashing the Stock ROM