If you want to use xiaomi.eu ROM for free, buy a Global device with snapdragon SoC.
https://xiaomi.eu/community/threads/supported-devices.65673/
https://xiaomi.eu/community/threads/community-funded-mediatek-support.66319/
No. You must not try to lock the bootloader on a custom ROM! (you will destroy the device)
This is not possible in the current situation.
Here is the answer: https://xiaomi.eu/community/threads/installing-magisk-and-play-integrity-fix.70553/post-748464
Here is the answer...
try installing the modem from the first post:
Garnet_modem_A15_OS2.0.11.0VNRMIXM
However, if this happens repeatedly in several versions of the OS, a factory reset would be a good option.(However, do not restore the "settings" item from a backup.)
use the search function before you start typing
https://xiaomi.eu/community/threads/regarding-google-play-integrity-google-pay-wallet.75761/post-748452
https://sourceforge.net/projects/recovery-for-xiaomi-devices/files/socrates/
It is installed in fastboot mode by entering these fastboot commands in the CMD command line:
fastboot flash recovery_ab filename.img
fastboot reboot recovery
In no case, and some banking, government applications, as well as other applications requiring strong integrity and device integrity will not work. (for example: Revolut, McDonald's, etc.)
In fact, even what the system "antivirus" offers is useless. I've been using Android for 16 years and I've never had my device infected with anything.
There's no need to install every piece of crap you see from GPlay. This mainly applies to various games, wallpaper apps, music, etc.
It's your...