Funny you suggest that -- I ran into a similar frustration with a Ford running Microsoft SYNC (voice command system) in 2008. If you hit the phone button while a phone was not set up via bluetooth, that would disable the rest of the sound system (i.e. anything other than telling you it can't find a phone). No matter which button you pushed, it couldn't switch away from the phone.
Only by stopping and restarting the engine could you get out. [1]
Only by stopping and restarting the engine could you get out. [1]
But these Mazdas can't even get out that way!
[1] See item 8: http://blog.tyrannyofthemouse.com/2008/07/setting-sync-strai...