Warning: Unlocking bootloader, installing recoveries, or flashing custom ROMs can permanently brick your device, void warranty, and may erase all data. Proceed only if you accept these risks. I assume you want a generic, complete step-by-step workflow for Vivo 1610 (a budget Vivo model; exact model variants may differ). Follow steps carefully and adapt device-specific filenames and commands.
Let’s assume you want to flash (the most common query). Here is the exact workflow: vivo 1610 custom rom work