1. Find "Mobile networks"
Slide your finger downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9717f731-0bbb-41a4-a428-d88e63b8cad1.png?width=214&height=380)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-143a935c-6c46-4dc4-892c-978ef52e4370.png?width=214&height=380)
Press Mobile networks.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1334d993-cfd2-4a3c-99fe-433d276bfb8e.png?width=214&height=380)
2. Turn data roaming on or off
Press the indicator next to "Data roaming" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0277b516-5924-41e5-bd97-6064b3855895.png?width=214&height=380)
If you turn on the function, press OK.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b5738cb1-2220-4560-a8c3-fd5b145de919.png?width=214&height=380)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-087b6e26-f4a1-488c-aeb3-6ace7f45af75.png?width=214&height=380)