Sure enough, right there on the screen, under “Blocked numbers,” was my sister’s mobile number. Next to it, a small icon.

He wrote it down on a sticky note and stuck it to his desk. He’s never lost a call since.

To check blocked numbers on a Samsung device, follow these steps:

I smiled. “It is in an obvious place — if you know the story. Phone app → three dots → Settings → Blocked numbers. That’s the path.”

He did. Then I pointed to the option that said .