This wikiHow article shows you how to prevent callers with blocked numbers, or callers not on your contact list, from contacting you on your iPhone.
Method 1 of 3: Using Do Not Disturb
Step 1. Open your iPhone's Settings
This is a gray app with gears on the home screen of your iPhone.
Step #2. Tap on Do Not Disturb
This can be seen at the top of the menu, next to a purple icon with a moon in it.
Step #3. Tap on Allow calls from
This can be found in the center of the screen.
Step #4. Tap on All Contacts
This can be found under the heading 'Groups'. Now only calls from phone numbers in your contacts will go through when Do Not Disturb is turned on.
- Swipe up from the bottom of your Home screen or Lock screen and tap the round, crescent-shaped icon at the top of the Control Center to Do not disturb on or off.
Method 2 of 3: Block calls when it says 'Unknown'
Step #1. Open the Phone app
It's a green app at the bottom left (or anywhere else on) your iPhone's home screen. There is an icon of a telephone in it.
Step #2. Tap on Contacts
This button is located at the bottom center of the screen and shows a silhouette of a person.
Step #3. Tap +
This is at the top right of the screen.
Step 4. Type 'Unknown' in the 'First name' and 'Last name' fields
Step 5. Tap on the Done button
This can be found at the top right of the screen.
Step 6. Tap on Block this caller
This is at the bottom of the screen.
Step 7. Tap on Block Contact
Now most calls labeled 'Unknown' will be blocked from your iPhone.
Friends who try to call you from an unknown number will not be able to reach you
Method 3 of 3: Block calls from numbers you don't recognize
Step 1. Open your Phone app
This is a green app, located at the bottom left of (or elsewhere on) your iPhone's home screen. There is an icon of a telephone in it.
Step #2. Tap on Recent
This is a clock icon at the bottom left of the screen.
Step 3. Tap the blue icon ⓘ next to a song you don't recognize
This is on the right side of the screen.
Step #4. Scroll down and tap on Block this caller
This is at the bottom of the menu.
Step 5. Tap on Block Contact
Now calls from this number will no longer reach your iPhone.