Everyone has a cell phone now. Dialing a number and having someone answer seems so ordinary, it is almost considered routine. But, a lot needs to happen behind the scenes for that call to get through. After the break, a graphic explaining how this works in more detail.
Removed embedded image after email request from email@example.com. To the team from cellphones.org, if you really did not want me to link to your image, maybe you should have not included a “use this code to embed into your site” option on the site. Thanks!
Removed after request from cellphones.org - you might want to search for the image.