As of 2025, the most stable and maintained ROMs are found on (Infinix Zero X Neo section) and Telegram groups (search: @InfinixZeroXNeoOfficial ). Below are the known builds:

A custom ROM is a modified version of the Android operating system that is not officially supported by the device manufacturer. Custom ROMs are developed by third-party developers, often with the goal of providing a more optimized, feature-rich, and bug-free experience compared to the stock ROM. They can also offer the latest Android versions, even if the device manufacturer has stopped supporting the device.

Once in Fastboot mode, run fastboot oem unlock and confirm on the phone screen using the volume keys. How to Install a Custom ROM on Any Android Phone (Example