Yes I can. But that cannot be generalized ! Let me illustrate what I mean. I am a man who either stay at home or works in an office, these are the two places where I stay the most, in that two land phones will be enough, one at home and the other at office. But consider a sales man who has to roam around whole day, then to catch him his friends and dear ones will have only one option if he keeps a mobile phone.
So the generalizations can be the following:
1) a person who either works only at one office or stays at home, he can avoid using mobile phones.
2) a person who has to travel many places needs a mobile phone always.