![Apple iPhone 11 Pro Max](http://wmstatic.global.ssl.fastly.net/ml/7071123-f-a1e023c1-bf42-4603-b46f-8925b0d10dfa.png?width=150&height=320)
Apple iPhone 11 Pro Max
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/7071123-f-67acfb0e-fc31-4a91-b661-a23f8183be42.png?width=210&height=454)
Press Mobile Service.
![](http://wmstatic.global.ssl.fastly.net/ml/7071123-f-3d281887-765b-4520-81fd-7157f7b97db5.png?width=210&height=454)
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/7071123-f-09751cdf-71ac-4263-93e7-b21aee772e5b.png?width=210&height=454)
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/7071123-f-09751cdf-71ac-4263-93e7-b21aee772e5b.png?width=210&height=454)