Latest versions (after 3.5 update) added 90 FPS for more devices like OnePlus, iQOO, ROG Phone, etc.
In BGMI (Battlegrounds Mobile India), the maximum framerate settings usually cap at 60 FPS (Extreme) or 90 FPS (Extreme+) for select high-end devices. A "Config File" is a modified game settings file (usually an .ini or .json file located in the game's directory) that forces the game engine to unlock higher frame rates on devices that are officially restricted to lower settings. Bgmi 90 Fps Config File -UPD- Download