1. Find "Wi-Fi preferences"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-3df21d6c-8ad6-4e10-aba5-675fc9fbdf62.png?width=206&height=368)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b0f7ca45-2176-42df-880c-15f069bfb2f6.png?width=206&height=368)
Press Network & Internet.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-6a340402-b126-4adf-9a26-f4d5393e80c8.png?width=206&height=368)
Press Wi-Fi.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-485a3bf2-8632-4224-b518-345c352e5dc4.png?width=206&height=368)
Press Wi-Fi preferences.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8e7f4601-3efc-4aad-83da-af87d92171bc.png?width=206&height=368)
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-eda9d022-d421-4cd2-9731-f7c2e1c3313e.png?width=206&height=368)
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-eda9d022-d421-4cd2-9731-f7c2e1c3313e.png?width=206&height=368)