From within the Settings app, scroll to and tap Apps.
Scroll to and tap Phone.
Scroll to and tap Blocked Contacts.
Tap Add New.
Select the contact you'd like to block.
When a contact is blocked you'll no longer receive phone calls, messages, or FaceTime from them.
To unblock a contact, tap Edit.
Tap the Minus sign.
Tap Unblock.
You've completed the steps!
