To forward all calls through Comcast, dial *72 you’ll hear a dial tone. Dial the ten-digit destination number. Stay on the line until the number is picked up by voicemail. If no one is available to hang up and dial *72 in two minutes. Dial *90 to activate call forwarding busy. Wait until you hear the second dial tone and then enter your ten-digit forwarding number. Call forwarding no answer and on the second dial tone type in the ten-digit number. For call forwarding not reachable dial *58 and select the appropriate responses to the prompts.