iOS 11.4 WiFi Problems

Hey guys! I faced the same wifi slow down issue with my iphone 6 with ios 11.4 until i uninstalled a lately downloaded app “Truecaller”, then my wifi issue was solved suddenly. It could be an app which tou have installed that caused the wifi problem! Check it out!

I have the same problem several times a day on my iPhone 6s Plus since updating to 11.4. I can get the WiFi back by setting the phone to airplane mode for about 10 seconds.

Try uninstall some of your lately installed apps to see if it helps

On my iPhone the problem is solved since the 11.4.1 update.

Same issue here - I have the following four iOS devices in use, all running on 11.4:

iPad Air 2 128GB: Badly affected by WiFi drops and reconnect problems

iPhone 6 16GB: Occasionally affected by WiFi drops and reconnect problems

iPhone 7 128GB: Not affected

iPad Pro 256GB: Not affected

The WiFi reconnect problems occured after upgrading to iOS 11.4!

The interesting thing is, that on the first two devices, the connection drops after about 10 seconds despite having connected succesfully. This can also be seen in the log of the router. The devices usually reconnect after roughly a minute and then stay connected until you go into screen saver mode or turn off the device.

Another problem that appears on all 4 devices since upgrading to 11.x, is the fact that the devices drop their WiFi connections a few seconds after the screen lock becomes active. This means that unless you have a mobile data connection, push mails and instant messages are being received with a huge delay. I have an old iPhone 5S that still runs on iOS 10.3 and that device is not affected by any of the above mentioned WiFi issues.

I’m now thinking of a new router. I notice that when I’m out of the house an on other unsecured networks, everything is fine. I’m now in DC on my daughter’s secured network, and again, just fine. Could my router be going bad and only affecting one device? My iPad? Not likely, but worth a shot buying a new one from Costco. If there’s no difference I can always return it,

I THINK I MAY HAVE FOUND THE PROBLEM.....

i belueve it’s a DNS issue. Poking around the manual network setup on my iPad Air 2, I noticed DNS servers that according to IT websites are VERY buggy. Specifically, these are public DNS that belong to Spectrum and Verizon (there may be others too).

hereks my solution which has been working all day...

1) goto settings, then wifi

2) find your network, click on the ‘i’ for info

3) goto CONFIGURE DNS, then click MANUAL

4) DELETE EVERYTHING EXCEPT 192.168.1.1 (that’s YOUR router)

5) add the following two DNS, 8.8.8.8 and 8.8.4.4. Those are GOOGLE public DNS.

6) HARD RESET your iPad/iPhone

this has now been working for me for hours, network comes back even after a complete power off situation.

Couple other things....

1) after the steps I described, make sure you return DNS to Automatic.

2) NEXT, if you have access to a MAC, hold Option and click the WiFi symbol in the menu bar, click on WiFi diagnostics

3) ignore the wizard, click WINDOWS, then SCAN

4) you’ll then be told best channel for 2.4 and 5 ghz

5) setbyour router for those channels AND, for 2.4 select bandwidth of 20, fir 5 ghz select 20 & 4.

all of this helps, but it doesn’t solve the entire issue.

I also have this issue with my iPhone SE. Whenever I leave the house and come back, wifi does not seem to connect. When I dive in to the settings, it says connected but no internet and I see the 4G symbol. I'm the only one on 11.4 and all other devices (Apple iPhone 4s, 5C, iPad 2, iPad Mini 2, Samsung tablet, Surface Pro 4 and HP Windows 10 notebook) work fine. Besides that, I only have the issues at home. My WiFi stays on all day at work, without any issues.

I tried 11.4.1 trough public beta, but the issue persists. I now hope that iOS 12 fixes the issue, so I guess I will try the next public beta.

When I updated to 11.4 the first time (right after the launch) I saw this issue, so I reverted back to 11.3. Guess what? Problem solved. Few days later I woke up and the iPhone SE had decided to update that night. Same issue occured. Every time I come back from work, I have to reboot my iPhone. This is very annoying, to say the least.

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.

An even quicker workaround for now until this problem is fixed is to swipe up and turn wifi off then on again ... this seems to do the job for me.

This however is hardly an acceptable fix. Is anyone from apple reading this thread?

I am a Wireless admin and the wireless network runs on Cisco WLC 8540 and OS 8.3.141.

I we tested on 2802 AP's, We use 802.1x on our WLAN.

We tested 4 iPhone. 2 with 11.3.1 It work. less than a sec and you are on.
With iPhone 6 IOS 11.4.1 It takes 5 min. but some times it only take sec.

- Rasmus

Interesting.

Have you tried turning your wifi router off and on?

Turning iPad off and on?

Reset Network Settings on iPad?

Other than these things, probably not much else you can do other than wait for the next iOS update and pray it's resolved in that release.

https://m.youtube.com/watch?v=DDoB5G-5Src

Use this link to downgrade IOS 11.4 back to IOS 10. I always regret updating to the latest IOS due to problems like this.

You know what it sounds like.

I bet you your router has a limit on the number of concurrent devices.

Disconnect your TV and see if your iPhone and iPad can connect OK.

Regards,

Donicles