As an IT guy, I need to have contact with department heads and some of their designated supervisors, but my number always gets out. So the company pays for one, and I have one for my own use. Just about the only way I can keep my away life truely away. COmes in really handy when I am away from work. I can leave it home and not deal with it either constantly ringing or I know right away which on is personal call and which one is someone I work with. Works well for me
Of course if it turns out these things really do cause cancer, I am screwed.