“I can’t!” she whispered. “I’m at the airport lounge in Mumbai. The Wi-Fi is blocking every cloud storage site for ‘security reasons.’ I can’t even email it—the file is 2GB.”

“Yes. Now, open it. On your tablet, turn on ‘Wi-Fi Direct’ from the settings. Name your device ‘Chandra_Q3.’”

“Arjun, the server is down. The entire server. The Q3 presentation for Seoul is in two hours. It’s on my Samsung tablet. Please. You’re my only hope.”

“It’s abandonware, ma’am. Samsung just stopped supporting it. It still works like a charm.”

Two hours later, Ms. Chandra’s face appeared on a 100-inch screen in a Seoul boardroom. The slides were flawless. The deal went through.