Why do you need a SIM card when traveling?
Why do you need a SIM card when traveling? A local SIM card is a physical SIM you buy at your destination. It's one of the most popular methods for getting cell service abroad because it's a quick way to secure data. SIM card vendors are present in nearly every international airport and offer a variety of data packages for your trip.
What should I turn off on my iPhone when traveling?
Check your Cellular Data options and turn off Data Roaming. In the Settings app, tap Cellular, or Cellular Data, or Mobile Data. Turn on Cellular Data, then tap Cellular Data Options. Turn off Data Roaming.