An (also known as Factory Firmware) is a barebones, stripped-down operating system used by factory engineers during hardware assembly and quality assurance. Unlike consumer MIUI or HyperOS platforms, an Engineering ROM contains no user interface decorations, security configurations, or background system restrictions.
Which are you using on your computer?
Wait until a green checkmark circle appears, signaling a successful flash. Xiaomi Redmi 6 6A Cactus Eng Rom
Common problems and troubleshooting