Block or Unblock Calls
Block or unblock calls from your device. Block unknown calls.
When a call is blocked, it is routed directly to voicemail. The call blocking feature may not affect phone calls made or received via third-party apps installed on your device. Please contact third-party app developers for assistance with such applications.
In this tutorial, you will learn how to:
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• Access blocked numbers
• Block and unblock numbers
• Block unknown numbers
• Access AT&T ActiveArmor Mobile Security
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Access blocked numbers
From the Keypad tab in the 
 Phone app, select the 
 Menu icon, then select Settings. Select Block numbers.
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Block and unblock numbers
From the Block numbers screen, you can add or remove numbers from the block list. Select the desired option:
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• BLOCK PHONE NUMBER: Enter the desired phone number, then select the Add icon.
• RECENT CALL: Select Recents, then select the desired number. When finished, select Done.
• CONTACTS: Select Contacts, then navigate to and select the desired contact. When finished, select Done.
• UNBLOCK PHONE NUMBER: Select the Remove icon next to the desired number.
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Block unknown numbers
From the Block numbers screen, select the Block calls from unknown numbers switch.
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Access AT&T ActiveArmor Mobile Security
To automatically block calls from likely fraudsters, get alerts on suspected spam, and manually block calls learn more about AT&T ActiveArmor Mobile Security. Free for eligible users.