1. Find "Wi-Fi"
Slide your finger downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a1845d8c-4ad5-42e4-b086-17ceeb9337ad.png?width=214&height=380)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0fe06809-4a1a-4447-94a8-afd643e6354f.png?width=214&height=380)
Press Network & Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9c5fda40-2fb5-44b8-931a-7337e40db3ae.png?width=214&height=380)
Press Wi-Fi.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-3f19754f-f1f4-425e-ba8f-fb949d2eeaa8.png?width=214&height=380)
2. Turn on Wi-Fi
Press the indicator to turn on the function.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5668c37a-9d9e-43cb-a450-9d2df88e361e.png?width=214&height=380)
3. Turn automatic use of mobile data on or off
Press Wi-Fi preferences.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-60b28d1f-91e9-46d6-b824-6fa85f561763.png?width=214&height=380)
Press Advanced.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-70c46fd3-6a39-414f-a7fa-c92f9ef23d55.png?width=214&height=380)
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-31bd6348-ac89-42f1-8fe7-1c82aab8b46a.png?width=214&height=380)
4. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-31bd6348-ac89-42f1-8fe7-1c82aab8b46a.png?width=214&height=380)