Some reserved protocol names cannot be associated with your app. There are two types: those reserved for Windows Phone built-in apps, shown in Table 30.4, and those reserved for the Windows Phone OS, shown in Table 30.5.
Any attempt to register your app with a reserved protocol name is ignored. When a URI is launched, if it contains a protocol name that is reserved for a built-in app, only the built-in app is launched.
18.220.114.0