From the Home screen, drag down the Notification panel.
Drag down the Quick settings panel.
Tap the Settings icon.
Tap Network and Internet.
Tap SIMs.
Tap or slide Roaming switch to ON.
Turning Data roaming on allows you to connect to data services while roaming. Turn Data roaming off to keep from incurring significant charges.
Tap OK.
Scroll to Preferred network type.
Tap Preferred network type.
Select your preferred setting.
You've completed the steps!
