Ensure your device matches these exact hardware specifications before attempting to use the 2021 firehose file: Specification Vivo V9 Pro Build Number / SKU PD1730CF_EX Processor Qualcomm Snapdragon 660AIE (SDM660) Storage Type eMMC Flash Memory Security Patch Horizon 2021 Security Revision Prerequisites for Using the 2021 Firehose File

In the tool, browse and select the prog_emmc_firehose... file from your extracted firmware folder.

The ProGemmFirehose method is a deep, low-level fix. It is helpful to compare it with other repair methods:

Flashing your device using a Firehose programmer will erase all personal data on the phone, including photos, contacts, and apps. Always back up your data before proceeding if possible.

To use the firehose file, your phone must be in EDL Mode, recognized by your PC as . Power Off the device completely.

Short the two specific test points (located near the battery connector) with tweezers while connecting the phone to a PC via USB cable. Check Device Manager for Qualcomm HS-USB QDLoader 9008 Using the Firehose File: prog_emmc_firehose file into your chosen flash tool (e.g., UMT’s QC Fire). Select the correct Official Stock Firmware (PD1730CF). Important: