If so, you can consider forwarding calls from your landline to your cell phone. It's really not that complicated. Just follow these steps, and your calls will be forwarded from your landline to your cell phone: 1  Dial star-seven-two (*72) from your landline phone, and wait for a dial tone [source: ATT ].f you want to stop forwarding your calls, simply dial star-seven-three (*73) from your landline telephone [source: Vonage, ATT ]. There are companies that set up call forwarding from your existing landline or even from a brand new number to your cell phone or other existing phone line.