Download the firmware package and move it to your phone's root directory (outside any folders).
: Historically one of the most popular custom firmwares, providing deep customization and overclocking support for older Y51L units. vivo y51 custom rom upd
: Known for its highly customizable UI, lock screen styles, and toolbox theming. Feature: The Ultimate Guide to Updating the vivo
If you have the or Vivo Y51L / Y51A (older models) — some very old versions had limited root access, but custom ROM development is virtually non-existent. Go to Reboot > System