Does anyone know of a way to change default calling application? For example, change my default application from MobilePhone.app to the Siphon.app? I have searched google and many forums for hours with no avail.

I also SSH'd into my iphone and tried changing the files in MobilePhone.app with the files in Siphon.app with no luck, I just lose the phone icon all together.

Any suggestions/Idea's would be nice.

Thanks