If you use your phone normally while you’re in another country, you might arrive back home to a very expensive phone bill.

Phone carriers sometimes charge upwards of $16 daily for you to use your phone internationally.

You won’t pay extra fees when your phone is on Airplane Mode, but you also won’t be able to use data, call, or text.

It can be be risky to remove your primary SIM card and replace it with one you bought at an airport kiosk.