Does this happen everywhere or in one particular place @Bigbros
This could be network mast congestion or mast issues. Your network will be able to help.
As a process of elimination can you try your sim card in another phone and then see what happens ?
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.The advice I offer is my own and does not represent Samsung’s position. I have no affiliation with Samsung.