Andrei Teodorescu

What happens if you don't use airplane mode on your flight?

What is airplane mode, anyway? 5 travel questions about flying with phones answered ©RossHelen // Shutterstock In many ways our phones have become the keys to our lives. We use them to bank, take photos of our families, and share those pictures on social media. We use them to buy everything from clothes to groceries to gasoline. And there's a good chance your phone holds an entire archive of every for-friends'-eyes-only texts you've ever sent.