After installing security update Jan 2024 i got error message "Samsung core error". Reboot loops and froze either in the home screen or in certain apps all the time, only way to get response was to use button combination to restart.

Chose to initialize the phone to factory reset and started with a completely clean phone, but it still doesn't behave normally.

Apps freeze or won't install and initialize properly, but don't get any error messages.

I need to have the phone rolled back to the previous update or have the phone reinstalled with a security patch that works, but it is listed as fully patched and cannot be reinstalled again. 

So, any advice would be apreciated. And if anyone else has experienced the same, please come forward since I need to find if I'm the only one. 

It's a shame to spoil such a good phone, so hopefully it will work it self out. 

Thanx all!