A tiny green light flickered. Then, from a speaker no bigger than a lentil, came a sound that stopped him cold.

But then, the story began.

Arjun eventually fixed his smartphone. But he kept the Nokia 1200 in his bag. And whenever that cheerful, blocky melody rang out in a café or on a train, strangers would look up and smile. They knew it. They trusted it.

Dee-dee-dee-dee-dum-dum-dum.

Because in a world of endless chaos, the most helpful thing you can be is