Use these instructions when trying to fix a Wi-Fi connection problem on an iPhone or iPad.
How to forget a wi-fi network on your iPhone and iPad
While in range of the wi-fi network you want to forget, you can do so right on your iPhone.
Launch the Settings app.
Tap Wi-Fi.
Tap the info button next to the wi-fi network you want to forget. It looks like a lower-case I.
Tap Forget This Network.
Tap Forget when prompted to confirm you want to forget the network.
