I am quite happy about Microsoft building a new mobile OS, Windows Phone 7. That is much better than just a upgrade for Windows Mobile 6.5. After I used Android, I don't really like to use Windows Mobile 6.5. Windows Mobile sounds a bit old fashions style interface. Now, Microsoft re-invent a new interface for Windows Phone 7. That is so great! Moreover, it can run Xbox live games. That is the greatest advantage!

However, there are some down sides on Windows Phone 7. That is very new. Not many applications are built for it. Moreover, so far, that is not still a real Windows Phone in the market yet! That sounds a bit too late!