Overview Features and Benefits How to Use AT&T User Guide
Auto Redial dials a busy number for 30 minutes, so you don't have to.
Auto Redial
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When you get a busy signal, hang up and dial *66. If the number is still busy, hang up again and let Auto Redial go to work. When your call goes through, you'll hear a special ring. You can use the phone to make and receive other calls while Auto Redial is busy redialing another number.