See also:

Playing music
Music search All tracks for which additional information has been stored can be accessed by the music search. Tracks without additional information can be called up via the corresponding album, ...

Telephone
...

Swapping the telephone and additional telephone
The function of the telephone and additional telephone can be swapped automatically. 1. "Telephone". 2. "Bluetooth® (phone)". 3. "Swap phone/addit. phone" ...