The Vivo 1801 (Y83/Y83 Pro) is a classic example of good hardware held back by poor software support and a locked ecosystem. While you will never see official custom ROMs like on a Pixel or OnePlus, the GSI community has kept this device alive.
Before attempting to install any custom software, you must complete these steps:
chipset, it is technically possible to unlock the bootloader and install custom software using third-party tools. Prerequisites for Flashing
15 Oct 2016 — so what we're going to do today is do some very very simple things just pigeon steps baby steps really just to see the principles. YouTube·Android Authority Create an Android Custom Rom (Easy Way)