1. Find "Mobile network"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-99a5aefd-723c-449c-bf49-40173841f468.png?width=206&height=412)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4db3e4f1-ec4f-4a95-8568-f783c96fe20a.png?width=206&height=412)
Press Network & Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f788ea76-6c02-4f23-96c0-1dfd66a57020.png?width=206&height=412)
Press Mobile network.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1490f08b-a079-4501-a24d-ce0d58d49127.png?width=206&height=412)
2. Turn data roaming on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-41d054f7-0f2e-4951-9615-7b58dc4cea96.png?width=206&height=412)
Press the indicator next to "Roaming" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-41d054f7-0f2e-4951-9615-7b58dc4cea96.png?width=206&height=412)
If you turn on the function, press OK.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f7fdafd6-8693-41b6-8803-58f31dac6b8b.png?width=206&height=412)
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-41d054f7-0f2e-4951-9615-7b58dc4cea96.png?width=206&height=412)