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Theodorant Author

Level 1

18 points

Wifi „no internet connection“ issues (iOS16)

Ever since upgrading to iOS16 my two phones have serious Wifi issues. It connects to my home Wifi but the connection is sluggish and unstable and the connection receives the label „no internet connection“. I have multiple other devices including two iPads, an iPhone on iOS15, a MacBook, all of which have no issues at all. This issue has also been reported last year after iOS15 rollout here. The issue does not occur on both phones simultaneously and pretty much at random. It first appeared on my older iPhone 12 and after receiving my iPhone 14 Pro Max, which has been setup using an iCloud Backup from the 12, the problem appeared there as well immediately.

Apple Support hasn‘t been much help yet. Reset network settings, delete all VPNs, restart router, set proxy to automatic, etc… all didn‘t help. This issue is also a pain to communicate. One Apple Support guy declared the problem solved as I could load a website (yay!). So my hope is someone from the community has silently found a solution for this.

Posted on Sep 19, 2022 10:39 PM

Top-ranking reply

Theodorant Author

Level 1

18 points

Posted on Sep 19, 2022 11:18 PM

I wouldn‘t be here if this generic help would have led anywhere. Again: Apple Support could‘t help as we went over these again and again. Also do I not see „contacting the ISP“ as a valid step, as 99% of my devices are running fine, except for two iPhones on iOS16. And another again: I AM CONNECTED with the internet and able to very sluggishly load webpages, but the connection is shown as „not connected“.

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97 replies

Dogcow-Moof

Level 8

36,629 points

Jan 15, 2023 12:04 AM in response to cshaze

Indeed.

One thing I've found is that many ISPs have their DNS servers running on the equivalent of an old PC.

Why? No one changes ISPs because DNS service is slow, they just change to a different DNS provider, so the budget goes to keep regular infrastructure running fast.

Feb 5, 2023 1:59 PM in response to Lawrence Finch

I don't understand all the technology terms but I have one iphone.that works on the same router the other iphone doesnt work. The iphone with the issue will also connect with no internet service to cellular data as well as a hot spot. Just started doing this today and not a single idea has fixed the problem this far.

Dogcow-Moof

Level 8

36,629 points

Feb 5, 2023 10:10 PM in response to Davismcadoo

DNS is the service that changes an Internet address name - say "www.apple.com" - to the numeric IP address needed to open a connection (for apple.com, it's typically 17.254.0.91.)

If this system isn't working, you might have an Internet connection but will never know it because address translation never occurs.

One way to work around DNS being broken or slow on many systems is to set your devices to use Google's DNS service for name resolution - but this can also cause problems on some networks.

Another thing that can cause this issue is running a VPN - your device may have a connection but your VPN does not.

One thing to check when connected to a Wi-Fi network is to look at:

Settings -> Wi-Fi -> (Network Name) -> Configure DNS

and check to see whether it is set to "Automatic" or "Manual;" in most cases "Automatic" is what you want.

Note that Network profiles issued by some employers also may modify these settings, and in some cases, improperly.

Feb 22, 2023 8:03 AM in response to Theodorant

I stumbled across this thread after my iphone 12 on iOS 16 started having issues with wifi connectivity. I had the same issue as some of the others in this thread and every network I connected to would always display "No internet connection" underneath the SSID.

This wasnt a problem with my router or modem nor the network infrastructure of my workplace. VPN was not the issue either since there were no VPN profiles installed on my phone. I went through several troubleshooting steps on my device and my router at home (Unifi UDM-P) and kept getting the same results. Every other device connected just fine except mine. I reset network settings, tried manual DNS servers, tried static IP addressing to no avail. I did not want to factory reset and restore the phone since that solution was not a permanent fix.

What did end up correcting the issue for now, was turning off the WiFi assist feature. Settings > Cellular > Scroll to the bottom and turn the Wi-fi Assist toggle off.

Hope this helps anyone else running into this problem.

Mar 16, 2023 7:52 PM in response to Theodorant

My iPhone wasn’t connecting to any of my networks after I updated my iPhone to 16.3.1. I use a wireless access list and I discovered that if I turned off my wireless access list, then I was able to join all of my networks. I noticed that my wireless access list contained 3 entries for my iPhone. One was for the main Wi-Fi address on the About screen of the phone. The other two entries were for the private Wi-Fi addresses of each of my networks (2.4 GHz and 5 GHz). However, the addresses were not the same as the addresses that were now assigned to my phone (go to Settings, Wi-Fi, and click on the “i” for each network to view the private Wi-Fi addresses). I updated the private Wi-Fi addresses in my wireless access list to be the same as the addresses for the networks in my phone and the problem was solved. I was able to turn on my wireless access list and still connect to my networks with my iPhone. I think the update to iOS 16.3.1 caused the private Wi-Fi addresses to be changed. I hope this helps someone.