1. Find "Wi-Fi"
Slide your finger downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f2d36dc6-85ee-4b90-a879-5f8640901ab7.png?width=208&height=426)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b8de8bfe-605f-4268-a984-b8e30031af21.png?width=208&height=426)
Press Connections.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-3129c1b7-66da-4778-977e-2b6e112be0fe.png?width=208&height=426)
Press Wi-Fi.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-228087a1-56b8-4bb3-b8e2-612465c44a46.png?width=208&height=426)
2. Turn automatic use of mobile data on or off
Press ADVANCED.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-99e0bd69-23d2-466c-b77f-f04996172deb.png?width=208&height=426)
Press the indicator next to "Smart network switch" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-fc5e3811-3a92-42a1-88c7-26e3f9dbcbd9.png?width=208&height=426)
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-fc5e3811-3a92-42a1-88c7-26e3f9dbcbd9.png?width=208&height=426)