I upgraded my phone 4 days ago to the S21 Ultra, and since then I am not receiving texts from my son, who lives with us and is on the same account. He receives my texts fine, and I seem to have no problem receiving texts from other people, including my wife in the same house. I’ve gotten texts from at least 5 people.
I’ve restarted my phone, and tried turning off wifi to make sure it’s not a wifi calling issue. Any ideas what else I can do?