WiFi not connecting after iOS 18 update

Pretty sure there is a bug in ios 18. I’m seeing a lot of talk of this issue on other forums, unifi, microtik, etc all blaming a router issue when its Apple’s software.

I have the same issue with my 15ProMax. It was working fine until I updated to IOS18.0.1. Immediately afterwards my phone turned into a piece of junk. Carplay apps won't operate properly. Phone won't give me decent connection to wifi, at home or away. Apps load slow to none. I spent an hour with support and they can't help. Want me to spend more time today.

I have updated network settings and reset all to factory default. Still stuttering

[Edited by Moderator]

joeanna146 wrote: "after installing ios 18.1 I cannot get wi fi on i phone."

joeanna ~ The long process of applying an iOS update to an old iPhone with a weak battery can be the proverbial "straw that broke the camel's back." So...

Does your iPhone 11 still have its original battery?

And what's the Maximum Capacity % here?...

Settings > Battery > Battery Health & Charging

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MikeLauderdale wrote: "...My battery health now dropped to 79% and this is the issue..."

Mike ~ Presumably, before the update, the battery was already weak at 80% and due for replacement. Then the long process of applying the iOS update to your iPhone with a weak, aging battery was the proverbial "straw that broke the camel's back."

But many mistakenly blame the iOS update instead of the battery — we see it all the time here in ASC.

A maximum capacity of 79% indicates a weak battery and explains the symptoms you're seeing. Apple suggests replacing the battery at around 80%. So have the aging battery replaced and all will (probably) be well:

iPhone Battery & Power Repair

About genuine iPhone batteries

Repair Provider Verification

(Articles found by searching Apple's Knowledge Base.)

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Jsmhope wrote: "...APPLE please fix"

Jsmhope ~ Your request won't be seen by Apple in these user-to-user communities. Go here:

Product Feedback - Apple

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I think apple are now finished for me - iPad and Iphone cannot connect to wifi after 18.0.1, MacBook not maintaining a charge

apple software is officially dud, worse than a PC and I thought I would never say that

too much rush for cash and not enough testing

I am experiencing the same problem. All other apparatus requiring WiFi connectivity is working fine, security systems, Alexa, Android tablets so it is not a router issue it is an iOS issue on my iPhone 15. When will it be resolved as it could compromise security and safety

None of the 6 apple devices in my home connect to wifi since updating. iPads are on 17.6.1 and iPhones are on 18.0.1. I’ve tried the suggestions listed here and they didn’t fix anything. How am I supposed to work if these devices don’t connect?

iPhone 12 Pro, iOS 18.0.1, Wi-Fi connects, no LAN and internet access, and I've tried all the suggested fixes (reset network, AP set to 5GHz [only], private Wi-Fi address off, limit IP address tracking off).

If I turn Wi-Fi off and then back on, I'll have internet access for less than 60 secs (Wi-Fi symbol showing on the iPhone, and I can see the WAN traffic on my router for my iPhone's IP address), but it soon stops (and stays stopped) until I turn Wi-Fi off and then back on again.

After Updating My Iphone XR to IOS 18 My wifi Stooped working, It doesn’t turn on and it also doesn’t turn off same thing happened with my personal Hotspot I have tried different measures to stop this like resetting Network settings even resetting all settings but nothing changed.I really need a solution to this problem As soon as possible.Thank you.

That doesn’t make any sense, alot of people have battery health below 80% and their phone works well, So you telling me all of a sudden I updated to the Ios 18 and the wifi stopped working Is because of an aging battery.Thats A lie, I hope Apple fixes the issue soon hopefully there will be a software update soon that fixes wifi issues.

This seems to happen whenever I update iOs, and it is really frustrating. I have an iPhone 14 and I just updated the OS to 18.1. Now, I'm getting the "No Internet Connection" message. I am using NordVPN; it seems to work fine normally.

So, how do you delete the problematic certificate and how do you identify it? I'm willing to try this if there's a chance of it fixing this issue. It seems to years iOS upgrades have broken WiFi or Bluetooth (even without NordVPN). Maybe someday Apple will get their act together.

Thanks!

Ce n’est pas un problème de routeur car tous mes autres produits (autres qu’Apple) fonctionnent très bien en wifi. Le problème vient d’iOS 18. J’ai suivis à la lettre les instructions qu’Apple donne en cas de problème de wifi et rien ne fonctionne ! Cela rend l’iPhone inutilisable sans une bonne connexion de réseau cellulaire (données mobile).

Had no problem with WiFi on my devices under iOS 18. Updated to iOS 18.1 yesterday and all was fine. Until waking up this morning and none of my devices was connected. Only way to work is to connect them to my phone through hotspot, but this is limited by my subscription.

Don't have a VPN on them and the other options of switching off Private Wi-Fi Address and Limited IP Address Tracking didn't work either. Samer with restarting the device.

So for me the only option at this time is to use HotSpot or not using my devices.

This is unbelievable.

Please help me solve this

DancingR wrote: "Not sure what happened, but after editing my reply and stating that I would copy the text to the original post, it became impossible to edit both posts."

You probably hit the 15-minute limitation on editing posts.

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