I am sometimes getting SMS messages in iMessage app from empty contacts. Such contact has a name (even it’s not in my contacts), but doesn’t have a phone number or email address. Hence, “Block this Caller” doesn’t work.
Bonus question: How it is possible that Messages app accepts such SMS messages anyway?
Main question How to block such SMS messages or enable some option that will prevent SMS without a phone number?
Here is an example of such empty contact. No phone number, no email - “Block” button doesn’t work.