While Windows Phone contains many new features, a number of capabilities and certain programs that were a part of previous versions up to Windows Mobile 6.5 were removed or changed.[1][2] Until Windows Mobile 6.5, the previous version did always cover the complete feature range of the predecessor version.
The following is a list of features which were present in Windows Mobile 6.5 but were removed in Windows Phone 7.0.
Actually, as a general matter, there are a whole lot of companies that we're working with pretty closely to figure out what additional capabilities developers want and need to add great new scenarios, and so multitasking is a good example of one we're already talking to people about, we're looking for the right way to implement it. So that's something you'll see come from us at some point.
... в Windows Phone 7 отсутствует поддержка USSD-запросов ...