Hello, everyone.
I made a mistake when updating the ROM on my Xiaomi 12.
I had already updated my phone with the stable version. The updater kept saying that an update was available, but it never downloaded.
So I searched for the version number it was reporting (1.0.9) and believed that there would be no other ROM with the same version. I ended up finding this one:
https://hyperosupdates.com/hyperos/cupid/version/OS1.0.13.0.ULCEUXM, which would be more up-to-date, by the way.
The update was done via FASTBOOT, but the device no longer started. So I went back to the stable version available here on the forum and the device started again, but extremely slowly and with some bugs. That's when I formatted the DATA partition, to try to get it back to normal. Almost everything went back to normal, but the camera, for example, no longer works.
I cleared CACHE and DALVIK, but it didn't work. What else can I try to do to fix this?