Hello,

I have a Nokia Lumia 710. I like the phone and Windows Phone 7 OS as well. I am also developing an own app for Windows Phone 7. While I was doing my research I came across a page with a detailed guide about how to develop an app for Windows Phone 7. There are code examples inclueded (if you are interested: Ozeki C# VoIP SDK – A SIP SDK for software developers). By the way I am also looking forward to the new Lumia 820 and 920 with Windows 8 OS.