1. From the home screen, swipe down from the top of the screen to reveal the Device Settings menu.
   
2. Tap Settings.
   
3. Tap Network and Connections.
   
4. Tap Mobile Network.
   
5. Tap the Mobile Network and Data Services switches to turn cellular data on or off.
   
6. Tap the Data services while roaming field.
   
7. Tap the desired option to enable or disable data roaming.