My example of otherHalf usage: you insert Jolla phone into a music-system (with large, high-fidelity speakers, et cetera), [...] Or, slide the Jolla phone into OtherHalf slot of drinks-vending machine on a train platform, [...] Of course, all of this requires that the music-system-or-snack-vending-machine would present their credentials, Jolla would check them, and somehow trust them.