How to blacklist incoming calls and text messages on Apple's mobile phone?

Step 1: Find the function options of "Settings"-"Information"-"Blacklist" in our iphone.

Step 2: We can add a blacklist here. You will not receive calls, messages or FaceTime calls from blacklisted contacts.

Step 3: If we want to cancel the blacklist, it's easy. Click "Edit" in the blacklist, and then click the red button, "Unlock!