When traveling internationally, your device settings may require an update to conserve data and minimize unwanted fees. Learn how to change your roaming settings on the device ahead of your next trip. You can enable or disable roaming at any time
From the Home screen, drag down the Notification Panel.
Tap the Settings icon.
Tap Network & Internet.
Tap Mobile network.
Tap or slide the Data roaming switch to ON.
Note: Turning Data roaming on allows you to connect to data services while roaming. Turn Data roaming off to keep from incurring significant charges.