1. Find "Mobile Data"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-88bb0d82-a160-4ad2-929d-bb068895c62c.png?width=200&height=358)
Press Mobile Data.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5b6014d6-f5fb-4baf-85e8-1c8d867fcd07.png?width=200&height=358)
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-485c84ea-a5fd-4645-8ff6-f7ef5c4b6d92.png?width=200&height=358)
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-485c84ea-a5fd-4645-8ff6-f7ef5c4b6d92.png?width=200&height=358)