Searching for on Google leads you to a minefield. Here is what actually happens when you install those files:
The landscape of mobile gaming has shifted dramatically over the last decade. Modern smartphones now possess processing power that rivals low-end PCs and even current-generation consoles. Naturally, this technological leap has fueled a massive demand for retro gaming and emulation on the go. Among the most searched terms in this niche is Xbox 360 Emulator Android Bios
Emulators generally fall into two categories regarding BIOS files: Searching for on Google leads you to a minefield
Native emulators like aX360e generally do not require a separate BIOS file to be manually loaded; they instead rely on internal firmware translation. Xbox 360 Emulator Android Bios