1. Find "Wi-Fi preferences"
Slide your finger downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-7c1213bb-0337-4321-9317-69f7f0e4825c.png?width=202&height=404)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-cb430479-9e13-42c4-9095-2999a8a92553.png?width=202&height=404)
Press Network & Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-7d6b292b-c541-407b-a63f-a2998f3c5c68.png?width=202&height=404)
Press Wi-Fi.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b41f548c-83d1-4d88-86db-0e6e00d37e79.png?width=202&height=404)
Press Wi-Fi preferences.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8421d29c-64e6-4b3b-866b-229621d8cb6a.png?width=202&height=404)
2. Turn automatic use of mobile data on or off
Press the indicator next to "Auto network switch" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-df66a1ca-a5ce-47a3-bb25-5f5634759e2a.png?width=202&height=404)
If you turn on the function, press ENABLE.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-cc7cacfa-a1dc-4220-8896-dd8ad0c71b11.png?width=202&height=404)
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-df66a1ca-a5ce-47a3-bb25-5f5634759e2a.png?width=202&height=404)