Wire frames for audio connection flow
In consistency with the Windows Phone 8 style, command labels are in all-lowercased capitalization style and page and dialog titles in all-uppercased capitalization style.
The notification "Connecting to audio..." is displayed when the user is in the process of connecting to audio. Once audio is connected, another notification, "You connected to audio," appears and then disappears in two seconds.
In notifications that inform the users of an action they just performed, I typically use active voice.
App bar menu
Command labels are in all-lowercased capitalization style in consistency with the Windows Phone 8 style.
Wire frames for "invite" functionality
Wire frames for two-way video functionality