How to Install ColtOS R v7.1 Android 11 on Samsung Galaxy A50. ColtOS R v7.1 comes with ROM OS Android 11 and basic feature only, Brought to you by: igors1974@sourceforge. This ROM Required: TWRP, It worked with TWRP based on OneUI 2.5 firmware. Status: ColtOS-R-v7.1-GsiTestProjects ( ARM64-AB ). Use at your own risk, I’m not • Read More »