iOS 11.4 WiFi Problems

What if there is a bug in safari when you have over 1000 bookmarks?

Did removing your bookmarks help?

I lose wifi on my 12.9 pro as well.

I have an Apple AirPort Extreme. Figured Apple to Apple would be rock solid. It isn’t.

Hopefully sorted soon.

Interestingly, my iPhone X seems to be ok with wifi. Also on 11.4.

Just experienced a similar issue with iOS 11.4 on iPhone X with netcomm powerline np508 adaptors. The iPhone would cause the network to fail consistently. The iPhone might connect after a reset, but ultimately the network would fail/hang. Connecting an iPad Air 2 running iOS 11.3 worked consistently as did a MacBook Pro. Connecting the iPhone X using a third party device to the same network, worked fine, it did not cause the network to fail (I used an EasyAccess WiFi box connected to the power line adaptor using an Ethernet cable). So there definitely seems to be a fundamental issue there.

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.

When I installed 11.4 on new iPad it was ok, the next day wanted install 11.4 on iPhone so did and my router went off. Had to call AT&T who said it was fine and connected. My TV went out also but came back on, everything came back on but iPhone one hour later. Weird. I have U-verse and it is supposed to be good. Have you heard when the “big” fix is coming. I had to buy unlimited data plan!

I‘ve had the same issue.

I’ve possibly solved it by disabling the 5 ghz radio on my Wi-Fi extender.

I noticed my Wi-Fi was crap when the backhaul light on extender (Netgear X6S EX8000) indicated it was using the 5 ghz frequency For backhaul. A day ago my Wi-Fi on iPhone 8+ & iPad Pro 9.7 started acting correctly when the extender indicator lights said it was using the 2.4 ghz frequency for backhaul. At some point the extender decided to switch back to the 5 ghz band and when it did, my iOS devices’ Wi-Fi cratered again.

In a random “why not“ moment I disabled the 5 ghz radio to test if it made any difference and things have worked like a charm since. Time will tell if it’s a permanent fix.

I’m far from being a techie and the explanation for this is beyond my pay grade and understanding.

I’ll leave that to the tech savvy and Apple software engineers.

Still needs an iOS fix so the latest extender technology can be utilized to maximum capability.

Something I do not like happened. I am disconnected from iOS iPhone and had to buy a data plan but, one morning news station I watch from 50 miles away comes in perfect now-before not. I think WiFi went to tv not my iPhone. When I downloaded 11.4 router went out with red lights flashing. Called AT&T said I was connected on their side. It shows connected on iPhone but NO WIFI. 11.3 and 11.4 took WiFi from iPhone.

Wow Linda!

Couldn't understand a word of that sorry.

But reading between the lines, I don't think you have an iOS 11.3 or 11.4 problem.

When you go to settings -> wi-fi -> (confirm it's enabled) -> <list of wifi networks here> (Can you see your router, can you see your neighbours router, can you see any routers?)

if you can, it's not your phone.

WiFi is connected to everything I have but iPhone. iPhone says not connected and NO WiFi as before. I bought data plan from Verizon to get Internet.

Yes, I see my AT&T router name and it says not connected after installing 11.4. I go to it and it connects for a nano second. It is not my router. 11.3 and 12.4 took WiFi signal strength away from iPhone. iPad was installed and it works. Wireless tv works.

I go to iPhone WiFi is says disconnected. Happened after 11.4 installed. iPads works fine after install TV’s work fine on AT&T. iPhone will show router name if I go to settings, WiFi and look up my router name it says disconnected so I go to the router name tap on it shows and leaves right away. I think there is something about iCloud Drive maybe. I turned it off and router came back briefly, longer than any time since download. It did keep asking for WiFi password. When is there going to be an Apple fix for this I wonder. I’m not wanting to install 12 if it is not helping.

Nope not modem, had it checked. 11.3 and 11.4 , everything has been working fine for years! I like U-Verse so far. Do not really trust install of anything else. It was your suggestion of rejoining network and connecting again that connected it though. That was easy, just add network password and surprise, surprise...rejoin

Can you teach us how to downgrade from 11.4 to 11.3.1? Had same issues, but wifi is ok. My date and time was hit by a bug after an update to 11.4 and my bluetooth too. Now I can not connect to Appstore coz of 11.4 upgrade. Need advise how to downgrade to 11.3.1??? I already complained to Apple but they said you can not downgrade.

Hi, read in reading farther up on pages of Apple community support, that 11.3 is no longer available to download. Go back to page one—of this formum and read everyone’s replies, there are some said that.

I’ve found 11.4.1 to be fine.... but here’s something else. The issue could very well be router . I suggest accessing router and turning off 5ghz. In general, 5 is only needed for gaming. Try it. It’s been reported that it solves the problem for some.

I’ve purchased a new router, dual band, but without automatic switching between 2,4/5 and am MUCH happier with it in general anyway. I’ve set my televisions to 5 and all apple products to 2.4. Oddly, Windows products don’t seem to have an issue.

It worked perfectly before last update. Router is working perfectly with Everything else, including 2 iPhone 7’s.

I will switch it to 2.4 to see if it solves it.

iPad Air 2i is the worst affected, it’s on virgin media super hub 2, duel band router.

I just did a google on your router and there are a million people with the same issue.

2 options, upgrade to superhub 3 or buy a cheap wifi only router (disable wifi on the superhub and use the new wifi router)