![Apple iPhone 12](http://wmstatic.global.ssl.fastly.net/ml/7011123-f-27d86d8d-3105-48aa-ab2b-06572ef6c749.png?width=150&height=320)
Apple iPhone 12
iOS 17
Turn Wi-Fi Assist on or off
You can set your phone to use mobile data automatically when the connection to the Wi-Fi network is weak. To turn Wi-Fi Assist on or off, you need to turn on mobile data.
1. 1. Find "Mobile Service"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7011123-f-388c0a61-04fc-4888-9276-1d0aeaccd8aa.png?width=210&height=458)
Press Mobile Service.
![](http://wmstatic.global.ssl.fastly.net/ml/7011123-f-66b50edf-392c-48c6-8469-400173cb7d6d.png?width=210&height=458)
2. 2. Turn Wi-Fi Assist 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/7011123-f-ba931938-0461-4763-b05c-573915daeb3e.png?width=210&height=458)
3. 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/7011123-f-ba931938-0461-4763-b05c-573915daeb3e.png?width=210&height=458)