@yiman try your sim card in another phone to see if messages are good that way.
Also double check what your messaging centre number is that your network uses and ensure that matches what is stored in the phone.
Samsung Help Link > Messages not working.
Daily Driver > Samsung Galaxy s²⁵ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
