1 Find "Mobile Data"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d1e1350b-ac35-4ede-8c17-82e814e5999d.png?width=192&height=344)
Press Mobile Data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-be9f031a-a9f6-4eb5-8906-bb75d2e61517.png?width=192&height=344)
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-3d66fbb1-7649-43e2-9d26-9e3d7f60e840.png?width=192&height=344)
3 Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-3d66fbb1-7649-43e2-9d26-9e3d7f60e840.png?width=192&height=344)