Block messages from your device.
In this tutorial, you will learn how to:
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1. From the home screen, select the  Phone app.
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2. Select the  Menu icon, then select Settings.
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3. Select Block numbers.
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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.
From the Block numbers screen, select the Block calls from unknown numbers switch.
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To automatically block calls from likely fraudsters, get alerts on suspected spam, and manually block calls learn more about AT&T ActiveArmor. Free for eligible users.