- ADD A NUMBER TO THE BLOCK LIST: From the home screen, select the Phone app. Select the Call logs tab.
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.
- Select and hold the desired number to block, then select Block number. Select BLOCK to confirm.
Note: To manually block a phone number, from the Phone app select the Menu icon > Call settings > Call blocking & Decline with message > Blocked numbers > Add icon > desired number location > desired contact > DONE.
- BLOCK UNKNOWN NUMBERS: To add all unknown numbers (no caller ID) to the rejection list, from the Phone app select the Menu icon > Call settings > Call blocking & Decline with message > select the Private numbers switch to place it in the on position.

- REMOVE A NUMBER FROM BLOCK LIST: From the Blocked numbers list, select the Delete icon > the desired number(s) > REMOVE > REMOVE again to confirm.Â

