Microsoft released a technical preview version of Windows Phone 7 on 18 July 2010. But it will release officially in Europe in October and the US in November of 2010 as well as Asian countries sometime in 2011. After looking at it's preview version its seems that this may be have completely new user interface which is named "Metro".BZTJ9AEAEJHM
Feature like phone, music and videos, email, office, and contacts. User can even add and delete tiles and edit them. Windows Phone 7 will have a more friendly touchscreen UI than previous Windows Mobile devices by using multitouch technology.
