How do you program the remote access code for a Panasonic KX-TGD220 wireless phone?

To program the remote access code for a Panasonic KX-TGD220 wireless phone, first, press the "Menu" button on the handset. Navigate to "Settings," then select "Answering Device," and choose "Remote Access." From there, you can set or change the remote access code by following the prompts and entering your desired 4-digit code. Finally, save the settings to complete the programming.