Captiveportal.nokia.com

Finally, I fixed this issue! What you need to do is, when this message pops up, what you need to do is go to wifi settings and try to find to which wifi is your iphone trying to connect. Once you find the name to the wifi which your iphone is trying to connect it, you need to select “Forget this network”. The point is that you could not fix it at home, you need to fix it once the message pops up! Hope this helps you all.

That is a result of connecting to a WiFi network that is not locked but requires acknowledgment of terms of use.

Like in a coffee shop, hotel, restaurant, etc.

Use captive Wi-Fi networks on your iPhone, iPad, or iPod touch - Apple Support

It has noting to do with a Nokia phone. You used a public Wi-Fi network that ran on a Nokia hotspot, and this was the login page for that hotspot. Open Safari, tap on the overlapping boxes in the lower right corner and close any page that shows that Nokia URL. Or just close them all.

If that doesn’t fix it go to Settings/Wi-Fi, find that hotspot, and forget it.

Try turning off “auto-join” for whatever network is trying to be connected to. It seems like the phone is trying to continually connect to an unsecure public WiFi network.

There may not be any intentional malicious intent of the “public network”.

In my case, this seems to be an issue with a spectrum public network.

Nevertheless, the network is not secured, and the phone is warning us of this. Many times you can’t forget these networks, because they are not technically previously stored in the phones remembered WiFi networks. They are just out there to be automatically connected to should we allow it.

This is very annoying, and I believe it has something to do with the spectrum certificate that I installed on my phone. Maybe others installed other certificates like it. Please chime in.

https://discussions.apple.com/thread/252109635?answerId=255263058022#255263058022

That’s what I tried to do, but I found that it’s not sufficient to just drag down from the upper right hand corner of the screen and turn that Wi-Fi button off in your shortcuts, you have to go to settings and turn it off there.

Deleting all your open browser windows in safari did seem to help.

But if your phone is set to auto connect to open SSID signals, it may pop back up again.

In settings Wi-Fi set Auto-Join Hotspot to "Ask to Join"

Reset Network Settings, is the only way I could fix it. General - Reset - Reset Network Settings.

The easiest way I have found to stop this was to shut off the wifi temporarily.

Until you leave the area where your iPhone is trying to connect to this wifi service.

I had same issue and I reset network settings and so far is resolved.

Yes I just noticed the graphic posted by the OP shows their phone on LTE which is a bit worrying.

Roaming around (within covid restrictions) to alternate cell masts might point to a general cellular provider related problem . Could be ios or network settings bug.

Taking out the SIM and replacing or reset network settings may help

Well with weird stuff that fails to go away I like the nuke option. Up to you if you think it is worth the effort of a few hours work

Backup and restore

(1) How to back up your iPhone, iPad, and iPod touch – Apple Support

(2) Restore your iPhone, iPad, or iPod to factory settings – Apple Support

(3) Restore your iPhone, iPad, or iPod touch from a backup

I got the same bug for my house WiFi. I just turned the WiFi connection on my phone off then on and it worked, though whilst looking through the details, I saw that this had something to do with a game I pre-ordered on the apple store, some popular tik-tok game. Hope this helps

This is more complex. It can happen on trusted networks (home-using Spectrum) or on Verizon LTE. This not directly associated with public networks but it’s behavior would indicate that the iOS thinks that it is connected to a public network. This could be a bug in latest iOS update

So, Apple is basically telling everyone of their users that they need to turn off their WiFi before they leave the house each and every time you leave & turn it back on each & every time you get home or to a hotel to eliminate this VERY annoying pop up. I can’t believe Apple has this programmed this way. There has to be some other underlying reason why they do this and you have to hit cancel 5-20 times each time this lame pop up starts. Any company with the technical knowledge they have shouldn’t have this happening to all of their customers who pay their salaries and dividends. 😡