1. Find "Mobile Data"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d1b44777-51da-4128-8e00-84a15f771d94.png?width=210&height=454)
Press Mobile Data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1d840b08-e698-49cd-93f7-2f276c01fa0f.png?width=210&height=454)
2. Turn automatic use of mobile data on or off
Press the indicator next to "Wi-Fi Assist" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a031bbb3-e202-44d6-808e-c9f584c43116.png?width=210&height=454)
3. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a031bbb3-e202-44d6-808e-c9f584c43116.png?width=210&height=454)