You may not find a mobile phone essential, but that's not a common view point. For many other people it is (perhaps the opposite to you?), that they don't need

You may not find a mobile phone essential, but that's not a common view point. For many other people it is (perhaps the opposite to you?), that they don't need a laptop or desktop. Rich mobile communications with people, and other internet information and services, is one of the most non-trivial practical leaps that has ever transformed society. And virtually every business operates in part over mobile phones. The advent of the web is a comparable transition.