How could anyone think of interrupting the tranquility of that cafe with music from their cell phone... I hope the jury really understood the reasons.
It reminds me of when I used the subway as a means of transportation daily, it was 7 am, everyone was silent and there was no lack of people listening to music from their cell phones without headphones. I was provoked to look for mine in my bag and give them as a present.
It's so frustrating to have noise when it's blissfully quiet!