If your iPhone is trying to connect to any unwanted wireless network then you can remove this WiFi network from your device. To remove WiFi Network from your iPhone you can simply do that from WiFi Settings. Follow this guide to remove WiFi network from iPhone so you can connect automatically to the right wireless network.
Remove Wi-Fi Network from iPhone
Step-1
Tap on Settings icon from home screen

Tap Wi-Fi option

Step-2
Here you will see the list of Wireless networks, tap on the arrow icon to remove a WiFi Network

Here, tap on “Forget this Network” button and then “Forget”, this will stop joining to selected WiFi network automatically.


See also:
Share Mac internet with iPhone wirelessly
How to use PC internet on iPhone
Worked for me, many thanks for info
That would be great, but I did exactly that and it still keeps trying to connect to the “forgotten network” . Then I try to go back and repeat the steps and the option to ‘Forget this Network’ is no longer there!
Me too
Forget this network isn’t an option. I took a screen shot but don’t see where I can upload
wifi not connecting it shows full signal But also it shows unable to join the network ple reply how i coonect to that wifi
awesome,It worked for me , thanks alot for info
My internet connection keeps saying I’ve entered the password incorrectly. I KNOW I have the right PW. I tried to forget the network but where you show an arrow I have a circle with an I inside. Now what?
“i in a circle icon” same as an arrow, tap on it and choose Forgot this network. Your wireless router password may be case-sensitive so make sure you are typing correct upper or lowercase letters.
My phone has the circle with the “I” in it BUT when I touch it it has no “forget” button. Just says join network. How do I delete this wifi??
oops i need to be notified so sent what about i phone5c w/ ios7
i clicked forget network then went reset network settings in both me and my man iphone5c and still old WiFi/router network shows & come bk as an option
**sorry i resubmit to be notified if adequate resolve is remitted
Does not work at all. I tap forget but it stays there.
My only option is to “Join”. Please provide link. Thank you
I can not take wifi off my phone. Do not want any thing on my phone including the things that’s showed up on my screen. I want to delete everything to do with it.
Within my wifi guest locations field I have a wifi guest location listed that wont delete (can’t even go to others listed (it highlights but won’t go to the available sites). How can I remove this site?
Have a guest site that highlights for removal when tapping the screen but it won’t take me to other (preferred) guest signal sites. Locked for some reason. Suggestions for returning my IPod 5 to capturing wifi for use???
Can’t do that because there’s no arrow !
I have someone hacking my iPhone from a computer. They are using wifi direct but they are also i need help