1. BLOCK NUMBER: Select the Phone app from the home screen.
   
2. Select the Menu icon, then select Settings.
   
3. Select Block numbers.
   
4. Enter the desired number to block, or select the Contacts icon to select a number from your contacts.
   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.
   
5. Select the Add icon.
   
6. UNBLOCK NUMBER: Select the Remove icon next to the desired number.
   
7. BLOCK ANONYMOUS CALLS: Select the Block unknown callers switch.