Seriously?
Sorry, I mean "Seriously, you don't know why?".
wouldnt the internet access charges to use skype via a mobile phone negate any savings made by the free skype call?
like most yorkshiremen, i only use mobile phones for making phone calls, and assume that the thousands of people who seem to spend their entire lives fiddling, caressing, upgrading and loving these damned gadgets are afflicted with some kind of obsessive compulsive fetish that renders them incapable of rational thought or cognitive reasoning.
i could be wrong of course, although i doubt it.