1. Find "Mobile Data"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-db0d1013-54a0-4782-b2ec-c4e9e84eef40.png?width=210&height=458)
Press Mobile Data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-750acf41-97ec-47d2-8255-56e2adc2dafd.png?width=210&height=458)
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-bdeb93fc-1eaa-4ff2-9ce3-85001174f460.png?width=210&height=458)
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-bdeb93fc-1eaa-4ff2-9ce3-85001174f460.png?width=210&height=458)