redmi 5

On my girlfriend Redmi 5's (rosy) the fingerprint reader is not working. When she tray to add her fingerprint it says that can't add fingerprint and go back to Lock screen settings

I recently started experimenting with xiaomi.eu I liked it a lot, but I have problems with the play store, the app stops and does not let me download or act as an app, likewise it happens with play games, which I do not know why they fail if I have the rom stable installed, is there any solution...

Can you use *no-support-for-this-app-on-this-forum* at miui eu 10.9.3.28 guys? I installed it but i can't take any pictures

When registering a finger at the end gives an error, help

to install the global rom on redmi 5 I have to unlock the bootloader, so my question is: if I install the global rom of xiaomi I can block it again and the global rom will continue to work !?