1. ADD NUMBER TO BLOCK LIST: From the home screen, select the Phone app. Select the Menu icon, then select Settings.
   Note: To automatically block calls from likely fraudsters, get alerts on suspected spam, and manually block calls learn more about AT&T Call Protect. Free for eligible users.
   
2. Select Block numbers.
   Note: 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.
   
3. Enter the desired number to block, or select the Contacts icon to select a number from your contacts.
   
4. Select the Add icon.
   
5. REMOVE A NUMBER FROM THE BLOCK NUMBERS LIST: Select the Remove icon next to the desired number.
   
6. AUTOMATICALLY BLOCK ANONYMOUS CALLERS: Select the Block unknown callers switch.
   
7. BLOCK A PHONE NUMBER FROM THE CALL LOG: From the Phone app, select the RECENTS tab > desired call > Details > Menu > Block number > BLOCK.