1 Find "Mobile network"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-80d3084c-dcfb-4cbd-8407-d84e16fb6a6e.png?width=204&height=430)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-4db2b8ce-df66-4c50-8715-ec0fb3f9df74.png?width=204&height=430)
Press Network & Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-86d9a3da-d1b3-4717-a082-bc4b542596e8.png?width=204&height=430)
Press Mobile network.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b1266bf9-cce8-4bc5-acc9-6d73c34e61d9.png?width=204&height=430)
2 Turn data roaming on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e859e421-05e0-4e7e-b74d-561e60ea8551.png?width=204&height=430)
Press the indicator next to "Roaming" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e859e421-05e0-4e7e-b74d-561e60ea8551.png?width=204&height=430)
If you turn on the function, press OK.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d8183f05-cfd4-4d2f-8e61-294af215d187.png?width=204&height=430)
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-e859e421-05e0-4e7e-b74d-561e60ea8551.png?width=204&height=430)