Thanks.I tried:
Master reset
Flash/install again android 12
Other sim cards
Clear cash in bios
Also i gived phone to services and also they dont know what to do.
The only solution is to change the motherboard, but that expencive.
The problem arose after the upgrade to android 12. After the upgrade, I lost the network. I can only make emergency calls. When I was on android 10, everything worked great.