1 Find "Wi-Fi"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-41c9ec0d-203c-4814-9e4c-9227dfd66e30.png?width=214&height=380)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-41d5d634-a082-4a8f-9e61-2185080ad44a.png?width=214&height=380)
Press Wi-Fi.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-26065048-8efa-4499-96b0-a7cdd2472252.png?width=214&height=380)
2 Turn automatic use of mobile data on or off
Press the menu icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-cba1e0d5-db0c-4c2a-a00f-1015297be9d0.png?width=214&height=380)
Press Advanced.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-367ef218-789e-4fc8-af94-4e9c5893bf13.png?width=214&height=380)
Press the field next to "Auto-switch to mobile network" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f7aa7096-98ed-497d-add9-449ede9c633d.png?width=214&height=380)
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-cba1e0d5-db0c-4c2a-a00f-1015297be9d0.png?width=214&height=380)