How to Install FluidOS-11 on Samsung Galaxy A50. FluidOS-11 comes with ROM OS Android 11 and basic feature only included GAPPS, Brought to you by: igors1974@sourceforge. This ROM Required: Installed TWRP Recovery. Version Information Status: Stable, FluidOS-11-Rum-GsiTestProjects-arm64-ab-GApps ( ARM64-AB ). Use at your own risk, I’m not responsible for bricking your device.