This is used for system updates and factory resets.
To help tailor any further troubleshooting steps, what is your phone experiencing right now, and what is your exact Vivo V9 model number ? Share public link vivo v9 loader
This guide covers everything you need to know about the Vivo V9 loader, from what it is to how to use it for unbricking and bypassing locks. What is a Vivo V9 Loader File? This is used for system updates and factory resets
In your flashing tool (e.g., QFIL), select "Flat Build" and browse for the prog_emmc_firehose_8953_ddr.mbn Flash or Unlock: vivo v9 loader