1. Find "Mobile Data"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a7b6471b-8a86-412f-ac2b-e9ea9cd109a5.png?width=210&height=454)
Press Mobile Data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d8e0c06b-5105-40d2-9146-79b80573c427.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-254608b4-85de-4a30-ab3c-dedbc7dba799.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-254608b4-85de-4a30-ab3c-dedbc7dba799.png?width=210&height=454)