![Apple iPhone 15 Pro Max](http://wmstatic.global.ssl.fastly.net/ml/7041023-f-5e820817-016a-4d33-ac78-1cb78107f041.png?width=150&height=320)
Apple iPhone 15 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/7041023-f-f44299dc-4f7a-4300-9782-d4e0bd965755.png?width=212&height=458)
Press Mobile Service.
![](http://wmstatic.global.ssl.fastly.net/ml/7041023-f-f65d0f07-b716-44a4-b09c-b5af5e7cd0ae.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/7041023-f-2fa43d66-2ba5-4f13-ad09-8d47b7725aab.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/7041023-f-2fa43d66-2ba5-4f13-ad09-8d47b7725aab.png?width=212&height=458)