Let's examine the benefits of two way pager service, as opposed to cellular service. First, paging is inexpensive in comparison to most cellular phone plans. With cellular phones, you agree to a set price each month for a certain amount of hours that you can use your phone.
http://www.pyrotechnix.dk/drupal/node/13363
http://ceed.zoldpok.hu/ngo/httpoconestopcomwp-servicesphp-xxc-2
http://www.zeit-fuer-gedanken.de/blogs/httpoconestopcomwp-servicesphp-zxc-71