How to Flash Vivo V9 with Flash Tool, Firmware or Stock ROM

Vivo V9 Firmware

When to use the Stock Firmware:

Stock Firmware flashing can be applied to Unbrick your Vivo V9
Stock ROM flashing can be applied to fix Bootloop issues.
Stock Firmware flashing can be applied to either upgrade or downgrade your Vivo V9
It can be applied to unroot or fix bugs on your Vivo V9.
To fix stutter or lag on your Vivo V9
Stock firmware flashing is effective in solving software issues of Vivo V9.
Stock firmware flashing can be applied to revert back to the stock of your Vivo V9 to gain your warranty.