This technique forwards all incoming call to the answering service.
When you hear a dial tone, dial ★ 7 2. When you hear the second dial tone, dial the number you want your calls forwarded to. Call Forwarding is activated when someone answers the number you dialed. If you receive a busy signal or no answer, hang up and repeat the first step within two minutes. You will get a confirmation tone indicating that this option is activated.
Dial ★ 7 3.