1. Find "Mobile Data"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1409db66-831d-44b9-9332-5a8ff531941f.png?width=208&height=454)
Press Mobile Data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-55d4febe-b337-418d-9d82-0494cbd0ffaf.png?width=208&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-9e6c08ec-e897-4feb-b42d-8b76c5f92ce3.png?width=208&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-9e6c08ec-e897-4feb-b42d-8b76c5f92ce3.png?width=208&height=454)