How to Flash Custom ROM Havoc GSI 3.1 Android 10 Q for Samsung Galaxy A50. Havoc comes with ROM OS Android 10 Q Security patch : January 2020. ROM Firmware Required: TWRP Recovery. Version Information Status: Stable GSI ROM, Last Updated 2020-01-28. To install this Custom ROM, your phone must be installed TWRP Custom Recovery. • Read More »