From the home screen, use two fingers to swipe down the Status bar.
Tap the Settings icon.
Note:If only one finger was used to swipe down the Status bar, swipe down again to access the Quick Settingsmenu.
Tap Cellular networks.
Tap System select.
To disable roaming, tap Home only.
To enable roaming, tap Automatic.
To permit data access while roaming, tap to enable Data roaming.
Read the warning. To continue, tap OK.
The roaming settings are now changed.