Plugged in the cradle, not Bluetooth, for media, phone, Siri etc should be fine.
Interesting, can you (or somebody) describe the differences between cradle and bluetooth (iPhone only here)?
i.e. when playing back songs (or podcasts) does it show progress?
Can you select a playback position in the song/podcast via a slider or something?
can you select songs, navigate playlist?
Any other differences?