Is there a way to perform Call in Windows Phone 7 without pressing any buttons?

Is there a 开发者_StackOverflow中文版way to perform Call in Windows Phone 7 without pressing any buttons?(If I use the PhoneCallTask then I will have to press the call button)

No. Actions like this deliberately require user interaction.

Not at the moment, no. In my personal opinion, it's unlikely to come in the near future either because of the potential for abuse - letting apps call premium rate numbers without any user confirmation would be a bit of a minefield.