1. Find "Mobile Data"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-1efa7f54-d461-4287-be24-4d7d29220b15.png?width=210&height=454)
Press Mobile Data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-03b15771-1724-4791-8654-d2b7ff7c137c.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-2fbe3d04-b96a-4edd-8a3a-d7031b2c7c45.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-cbf68c4a-a97b-4667-bed5-3511017a8a36.png?width=210&height=454)