What happens if you don't use airplane mode on a flight? Here's the answer to that, and more common travel questions.

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.

Even if we're planning to unplug on a trip, it feels almost unthinkable to leave our phone at home. We use them to check in for flights, act as our boarding passes, book ride-shares or plan bus routes, find restaurants, check museum hours, or just kill time. But given all the extra phone usage that comes with travel, we're presented with myriad new concerns. What's safe and what isn't? Can you trust this public Wi-Fi network? Our pocket-sized devices may feel even more necessary outside of our comfort zones (not to mention time zones), so protecting them and all the info they hold seems even more critical when we're away from home.

In partnership with Visible, Stacker looked at recommendations from manufacturers and consumer experts for smart and safe ways to fly with your phone. Can you use an unprotected Wi-Fi network at a cafe? Should you trust the chargers on the plane? Find out the answers to those questions and more.