iOS 11.4 WiFi Problems

It is NOT your router 100% guaranteed and not all Apple Products are affected even in the same household. Save your money and wait for a fix from Apple, 11.4.1 has been sent to developers to beta test or you can go to the Apple Store and have the Genius revert your Apple product to 11.3

This seems to be a problem with some older router models in iOS 11.3 and 11.4 releases. I was able to fix this for my devices, that exhibited the same behavior after updating to iOS 11.4, by doing the following:

1) Factory reset the network configuration in settings. Reason being that I couldn't manage the WiFi connection from the usual menu anymore, so I couldn't make the device forget the WiFi and couldn't trigger another prompt for the password. By resetting all network configurations, I the password prompt would reappear upon conncection and initial configuration would go through properly, with the device able to connect to the internet as usual.

2) However, this fix turned out to be only a temporary one, as the device would again lose WiFi connectivity at some point, after waking the device from sleep for example. I noticed that in that case, the entry for the router / gateway IP would be empty. So the fix for this has been to factory reset the network configuration again as noted above in order to reconnect properly again - and the going into the WiFi settings and hitting the little info button next to the active WiFi connection (symbol: small "i" in a circle) and note the IP config under "IPv4 address". Copy this down somewhere and, on that same screen, tap on "configure IP", switch this from "automatic" to "manual" and fill in the exact same IP config data you noted earlier.

After that, the device has been keeping up the WiFi connectivity for several days now.

I installed 11.4.1 on all of my devices yesterday and it seems the WiFi reconnection issues have actually disappeared on the devices that were affected before (iPhone 6 & iPad Air 2). My other 2 devices are still unaffected (iPhone 7 & iPad Pro) by any connectivity issues.

Since there are theories that see 5GHz Access as the culprit or even the extended channel bandwidths, here is a short description of my network environment:

My router uses 40Mhz bandwidth on 2.4GHz and 80MHz bandwidth on 5GHz. My home network consists of a central router and 2 wireless repeaters that are all connected in a wireless mesh configuration. The SSID in use is identical on each network device and on each frequency band. According to the logfiles, all devices connect with either 5GHz or 2.4GHz depending on proximity to the router/repeater.

The only issue that remains with 11.4.1, is the fact that the mobile devices drop the WiFi connection, once you block the screen of the device. If your device does not feature an additional mobile data connection, it means that instant messages, WhatsApp messages, e-Mails and alerts will be displayed with a delay of up to several minutes.

I suppose this nagging issue will remain, because it extends the battery life of the device.

I have a workaround that appears to work. For each wifi network that you are having problems with, you can snapshot your IP and DNS settings. Next, change your settings to manually configure the network and use the same IP, subnet, gateway, DNS, etc. that you just took a snapshot of.

As a bit of background, I did not have any wifi problems with my iPhone 7 until the 11.4 update. It became annoying enough for me to experiment with workarounds.

I was finally able to resolve it by restarting my modem/router, restarting my phone and then resetting my network settings. Still *****, because now I have to enter passwords for all of the wifi networks I've used in the past. So frustrating.

Cheers! Apple. Thank you so much, I really appreciate it ... this new version 11.4.1beta3 solved the constant disconnection of the WiFi network on my iPad!!!🙂😍✅

Have you tried 'forgetting this network' and rejoining?

I did the forget this WiFi and joined back

asked for password as you suggested and it worked so far WiFi stayed connected !!

Of all the fixes, separating the 2Ghz and 5Ghz network was the best work-around.

Hi

Turn off your router for 20 /30 seconds when it's back on go to settings on ipad

Down to reset Reset network settings After reset enter your router wireless key.

Later go to website for your make of router check for firmware update.

Cheers

Brian 🇬-1F1E7;

Just DONT upgrade when offered to upgrade you have to "opt in" to get 11.4 Apple released 11.4.1 to developers to beta test just a few days ago so just wait until 11.4.1 is available to the public in a few weeks. Apple is aware of the problem.

I believe this is solely IOS 11.4, I am having the same issue with my iphone 7 right after downloading the IOS 11.4 a few days ago. I have spent 7+ hours trouble shooting with apple customer care, and have tired everything by myself and with them instructing me. They are now telling me I need to buy a new phone, and they haven't had any reports on IOS 11.4 "graying out" wifi. So I am going to try and launch the "Feedback" app and report this IOS 11.4 bug issue there (according to the apple lady thats the only way to get heard, thus the more who report the IOS 11.4 bug the sooner they will start looking at themselves and fix the issue). Every device I own is working flawlessly with my wifi network besides my iphone 7 after IOS 11.4 update, therefore I know for a fact this is the issue, I don't need to buy a new phone.

Yeah, just register (AppleConnect Sign In) for the iOS 11.4.1 public beta, install the profile, check for updates, install latest beta, done)

Or just wait 'till the public beta soon goes GM (golden master and final version). I'm guessing public beta 4 will be the last beta.

I did the network and all setting reset, then shut off my phone and it would work for a couple hours; until I’d have to redo the process again and again the first few days. But then that process stopped working, completely. I finally have had my iPhone 7 back to normal today since the new IOS 11.4 update. Long long story short, what fixed it for me (for 24hrs now) was by backing my phone up to my Mac, (since I didn’t have WiFi I couldn’t do it with iCloud), then restoring it to a “new phone,” then plugged it in to my Mac again and did the backup restore. And my phone is finally normal again! I’m sooo happy!! I just hope it lasts, but I’m very hopeful! :)

Back your phone up into iTunes, then do a full restore to make your iPhone new, then restore to your back up. That’s what fix my phone finally so far for about a day and a half I’m having no issues!!