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This can usually be accomplished by picking up the receiver, or by pressing the "Call" button on your cordless telephone. You'll usually enter either *72 (Verizon or Sprint) or *21* (AT&T or T-Mobile) into the phone and then press the "Call" button, which is usually a green phone-shaped button. Call forwarding codes vary by region. If you're unsure of your phone's forwarding code, consult the manual or the website for the phone. You should hear a beep or an audio prompt to enter a phone number, at which point you can proceed. Type in the 10- or 11-digit number to which you want to forward your home phone's calls. Press the # button on your home phone to do so. On some home phones, you may have to press the "Call" button again after doing so. You should hear a beep or a chime several seconds after dialing the pound key. Once you hear the chime, you can hang up your phone; your call-forwarding service should now be active. In some cases, you may receive an automated response that confirms you have activated the call forwarding service.

Summary:
Activate your phone's dial tone. Dial the call forwarding service. Listen for a dial tone. Enter your cell phone's number. Dial the pound key to complete setup. Wait for the confirmation tone.