![Apple iPhone 15](http://wmstatic.global.ssl.fastly.net/ml/7290923-f-f3b629de-3ea7-49e3-8e5c-72bdedaec75c.png?width=150&height=320)
Apple iPhone 15
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/7290923-f-d816297e-2fb8-4301-898b-43f581324aa6.png?width=212&height=458)
Press Mobile Service.
![](http://wmstatic.global.ssl.fastly.net/ml/7290923-f-e665e259-4b8f-4b07-aecc-def4f0544030.png?width=212&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/7290923-f-1c9b5bb8-0a66-4e0e-84b9-0ed313b12978.png?width=212&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/7290923-f-1c9b5bb8-0a66-4e0e-84b9-0ed313b12978.png?width=212&height=458)