1 Find "Advanced"
Slide your finger downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0bc70fc1-efab-4736-9fda-976e9bff0997.png?width=202&height=358)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-2769db16-c423-475e-bd2c-44abd472ffff.png?width=202&height=358)
Press Network & Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9418fb96-fe45-473e-bd40-4c34a79d62b5.png?width=202&height=358)
Press Wi-Fi.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-79a8b847-194d-40eb-855f-a13d4e7c28a9.png?width=202&height=358)
Press Wi-Fi preferences.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-853ca9a9-b0f2-4a88-a1f0-8f0bec42e1da.png?width=202&height=358)
Press Advanced.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-cda77cfa-29f5-40e6-957c-f895e293f075.png?width=202&height=358)
2 Turn automatic use of mobile data on or off
Press the indicator next to "Switch to mobile data automatically" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-018156bc-bb8a-44f9-a605-08dcd3c7b092.png?width=202&height=358)
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-018156bc-bb8a-44f9-a605-08dcd3c7b092.png?width=202&height=358)