Hmm, not sure about that. I think the phone will support some protocol which you can implement in the .NET framework, but no experience with that. Also check http://www.microsoft.com/en-us/netmf/default.aspx[^]. I have used an old model of the GHI board for demonstration purposes. I was impressed by the ease of setup. Created a simulation environment for it to test the software without the hardware and when the hardware came, just loaded the software and yipee...

How about this: http://www.ghielectronics.com/[^]. It uses the Micro .NET Framework. Have seen some demonstrations of it. Runs from within Visual Studio and includes full debugging support.