Touch the Settings icon on the Home Screen of your Apple iPhone.
Touch the listing for Phone, or Messages, or or FaceTime.
If "Phone" is touched, then touch Call Blocking and Identification, and a list of phone numbers blocked will appear.
If you want to unblock a phone number, touch "Edit" in the upper right corner of the phone, and red circles enclosing a minus sign will appear before each number listing.
Touch the red circle/minus sign, and the number will disappear from the list and the number will be unblocked.
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If "Messages" touched, scroll down to "Blocked" under the SMS/MMS heading, then touch Blocked, and a list of phone numbers blocked will appear.
If you want to unblock messaging from a phone number, touch "Edit" in the upper right corner of the phone, and red circles enclosing a minus sign will appear before each number listing.
Touch the red circle/minus sign, and the number will disappear from the list and the number will be unblocked.
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If "Facetime" is touched, scroll down to "Blocked" under the CALLS heading, then touch Blocked, and a list of phone numbers blocked will appear.
If you want to unblock FaceTime blocking from a phone number, touch "Edit" in the upper right corner of the phone, and red circles enclosing a minus sign will appear before each number listing.
Touch the red circle/minus sign, and the number will disappear from the list and the number will be unblocked.