Hi Jonah,

Here is a list of all the core device capabilities available using Mobile
ASP.NET:
http://msdn.microsoft.com/library/en-us/mwsdk/html/mwlrfDeviceCapabilitiesTable.asp

Unfortunately, there is no pre-established way of figuring out whether a
device
has a polyphonic or truetone ringtone.

This would involve some work on your part but you can compile a list of
devices
that support polyphony, ect and filter against the device's user agent.
Please refer
to the Mobile Device Capabilities page on the MSDN website:
http://msdn.microsoft.com/library/en-us/mwsdk/html/mworiMobileCapabilities.asp

Thanks,
Jean-Luc David
Microsoft .NET MVP
dotnetmvp@hotmail.com
http://www.stormpixel.com
http://weblogs.asp.net/jld/

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