Open the Phone app
Tap Recents, Contacts, or Favorites
Tap the info icon next to the number
Scroll down
Tap Block this Caller
Tap Block Contact to confirm
Open the Messages app
Open the conversation
Tap the contact or number at the top
Tap Info
Tap Block this Caller
Tap Block Contact to confirm
Open the FaceTime app
Tap the info icon next to the number
Scroll down
Tap Block this Caller
Tap Block Contact to confirm
Open Settings
Tap Phone
Tap Blocked Contacts
Tap Add New
Select the contact to block
Open Settings
Tap Messages
Tap Blocked Contacts
Tap Add New
Select the contact to block
Open Settings
Tap FaceTime
Tap Blocked Contacts
Tap Add New
Select the contact to block