A (usually named prog_emmc_firehose_8917_ddr.mbn or similar for the Snapdragon 215 series) is a digitally signed programmer file. It establishes a read/write data link between your computer and the phone's internal memory when the device is booted in EDL mode.
Because the Nokia 1.4 does not support direct EDL commands via Fastboot, you must short the hardware test points and load a dedicated to communicate with the device's eMMC. What is a Nokia 1.4 Firehose Programmer File? Nokia 1.4 Firehose Loader Download- - Google
Without this file, flashing tools cannot send raw commands to wipe partitions or reinstall the factory OS. Download Links & Requirements A (usually named prog_emmc_firehose_8917_ddr
Browse and select the downloaded .