Well...don't have any idea yet.  Actually, I don't want to study Microsoft anymore.  Want to study Mac engineering.  But so expensive....

ben, the other party must have the same app installed?

Oh.  I am talking if you want to use skype to call long distance call to other people's home line or cell.  Then you have to pay $.  But the point is:  Skype only allows you to call with wifi, not 3G.  So...if you use unregister 3G to unregister Skype, then it will lost this limitation.  And you can call you oversea friend on street anytime.

似 m$ o個類? 但個 market 咪好細o羅, 唔咁多公司全用 mac 喎! 不如讀 linux o個類啦

即係變相免費??

But...i am newbie for Linux.  I know nothing about it....

Well...you can say that.  變相免費....don't need to pay long distance fee to your cell phone service provider.  (MUCH CHEAPER)

Egg...by the way...too many too many subjects that we need to study from M$......

ben, ohhh i see!  即係方便左..

Yes.  I only pay Skype $10 (Not monthly), then I can use it to call my sister in HK anytime.  When the fee is almost finish, they will let you know, and you can put in another $10 in.  Pretty good.