1. Find "Wi-Fi assistant"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-284f0f54-3525-4fc7-b579-5d69e2579915.png?width=204&height=408)
Press Wi-Fi.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d575ec2b-821a-4075-99d1-8f542a695804.png?width=204&height=408)
Press the indicator next to "Wi-Fi".
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-33f078a7-793e-4c37-b2dc-b62d551dc8e6.png?width=204&height=408)
Press Additional settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-cddebeb6-4a66-4eb8-a45d-3b872a64b792.png?width=204&height=408)
Press Wi-Fi assistant.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d85baa60-517d-47d3-bbf2-34df0877d090.png?width=204&height=408)
2. Turn automatic use of mobile data on or off
Press the indicator next to "Wi-Fi assistant" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d62acdf1-4525-4d07-9f2f-69a2b8967a95.png?width=204&height=408)
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-d62acdf1-4525-4d07-9f2f-69a2b8967a95.png?width=204&height=408)