Starting from iPhone 7.. the headset (top speaker) also acts as an external speaker. Say you're playing music/listening to the radio at full volume (from iPhone and NOT headphones) and you get a call. The music playback pauses and you answer the call. Say the call gets disconnected, and you still keep the phone to your ear.. does the music/radio resume blasting music into your ear at full volume from the top speaker or does the proximity sensor prevent this?