This is where many users stumble. There is no universal firehose for all MSM8953 devices due to:

Based on known Firehose programmers:

The PBL waits for a Sahara handshake. Your PC sends a “Hello” packet; the PBL responds. Then the PC must upload a small programmer (the prog_...mbn file) using the Sahara protocol. The PBL copies it to internal SRAM and jumps to it.

fh_loader --port=\.\COM3 --sendxml=programmer.xml
--showpercentage --memoryname=emmc

8953 Ddr.mbn: Prog Emmc Firehose

This is where many users stumble. There is no universal firehose for all MSM8953 devices due to:

Based on known Firehose programmers:

The PBL waits for a Sahara handshake. Your PC sends a “Hello” packet; the PBL responds. Then the PC must upload a small programmer (the prog_...mbn file) using the Sahara protocol. The PBL copies it to internal SRAM and jumps to it.

fh_loader --port=\.\COM3 --sendxml=programmer.xml
--showpercentage --memoryname=emmc