Will Apple's SMS interception never be seen?

Of course. Apple's SMS interception will never be seen.

1. First, find the "Phone" icon on the iPhone home screen and click Open.

2. Secondly, find the strange phone number you want to block in "Recent Calls" and click the "Details" icon on the right side of the phone number column.

3. Then find the option "Block this incoming number" at the bottom of the phone number profile information and click it.

4. Finally, click "Block Contacts" in the options that pop up at the bottom, and then click "Unlock this calling number".