
The once necessary wired phones have been replaced by unique mobile devices. A new survey from the National Institutes of Health has stated that the majority of US residents still have both a home and mobile phone, but many are increasingly snipping the wires on their traditional home phone service in favor of a wireless phone. Studies conducted during the July-December period of 2006 found that less than one in eight adults (11.6 percent) lived in wireless-only households. Two years before that, only one in eighteen adults (5.4 percent) lived the wireless lifestyle.
This and many other studies clearly indicate that the mobile phone is going to be the only medium of communication soon and the landline is going the way of the old rotary phones.
Source
http://www.newlaunches.com/archives/landlines_may_soon_go_extinct.php