If you have Comcast, Xfinity, or Century Link:


Turn on call forwarding
  1. Pick up the line with dial tone
  2. Dial *72 if you want all calls to automatically forward. Dial *71 if you only want unanswered calls to forward.
  3. Dial the 10-digit phone number (including area code) where you want your calls to be forwarded. ...
  4. Wait for a confirmation tone and message.
  5. End the call.


To undo the forward of your lines

  1. Pick up the line and make sure you get dial tone.
  2. Dial *73 
  3. Hang up