ios 11 slow wifi speeds

Yes. 7s plus. I use my phone to test the Wifi in my home. Normally I get speed tests of 116 mbps now I get 70 mbps ish for my 100 mbps service. All of my other MAC devices are speed testing at the 116 mbps range. Not 100% sure if it's the update or maybe the phone is experiencing a problem, coincidence?. Everything seems ok just slower.

Update. Rebooted phone-same slower speed test results. Then turned WIFI off/on. For the first time since iOS 11 update I get the 116 mbps test result. hope consistent and not a fluke.

I've been having the same issue. I tried everything in my power to change it including resetting my phone to brand new. Didn't work

The only thing that worked was changing wifi networks. Where I work it's perfect but at home it's awful

iPhones have a quality for poor WiFi signals since forever, it may just be your router that's not powerful enough

After plenty of testing, iPads (Air 2 / 10.5), iPhone 7 Plus (after reset all settings) are working fine on WiFi.

6 Plus is erratic on WiFi. Seems keychain is messed up between the 6 Plus and the Air 2, which are linked via wife’s iCloud account. I’ve reset her phone and no luck. Just so weird. Hit or miss. Sometimes gets consistent speeds, then reverts back to getting lousy speeds. Has to be some conflict in software. Just will have to be patient for fix.

Chaz,

Another curveball in this WiFi saga. 😁

Had another issue with WiFi not waking up and intermint speed issues, after swapping modem again!

Finally got someone at Time Warner Cable Tier 3 Tech Support who knew immediately there was a problem in line somewhere from outside to the modem. Says he could see it happening for a few weeks and that swapping modems or changing settings would never correct this issue at the line. Said that signals will spike, confusing modem and basically putting it in a locked type state. Was happening on prior modems as well.

Why other tech support people didn’t notice this, not sure? I believe after third call, they escalate the issue and you get someone who has enough experience to diagnose these issues. I have a tech coming out here tomorrow to correct the issue. I’ll keep you updated.

He did says one thing that was very interesting. He said some Apple devices can hang on 5GHz connection, that would require you to turn the connection off/on to reconnect. He said Apple was aware of the issue.

I also have same issue on my iphone 6. Its only happen after update ios 11. The worst is my ip6 wifi disconnected. I try to connect again (manually) by choose the wifi network. Then it ask the password. When i key in the password it keep popup “incorrect password” and “unable to connect to network”. After few times try, i leave it (after 3@4 hours) it automatically connected. (At the moment, i cannot connect- already 2 hours).

My laptop@ other smartphone (except iphone ios 11) able to get up to 25mbps but my ip6 only can get 1mbps. Its really *****. Hope apple can fix this issue soonest. Its already months.

That’s really interesting because all of my iOS devices had horrible Wi-Fi speed with my airport extreme. None of the settings changes I tried either on the phones or on the router made any difference. I just replaced my airport extreme with a Netgear nighthawk AC 2300 router and it seems to have resolved all my issues. Strange?

i have come to a conclusion where it only slows down the wifi when you charge your phone with wifi on

For me Safari is the culprit. Slow or even not loading pages at all.

Installed Firefox, loads ok.

iOS 11.01 on iPadPro 9.7

Did you assign a DHCP reservation for your devices?

Everything still working fine here. I’m on Cricket (At&t). On carrier update 30.0.

Me (iPhone 7 Plus) and wife (iPhone 6s) both have extremely slow wifi since upgrading to iOS 11.0.1. It’s basically unusable but running off 4g and turning off wifi makes downloads fast again. It is very frustrating as our iPad 4 works normally on wifi. Wifi for everything else in the house is fine.

what settings did you leave the Cellular roaming data at? did you enable Voice and Data?

I honestly think that its what you said, that Cellular or LTE and wifi are fighting one another, not knowing who is in control..

I performed your steps and it does seem snappier...I will know when i get to my home network, were there are limited number connections

Roaming Off. Voice & Data On. I’m on a home network as well. Let me know how it goes on your home network.

My 7 Plus seems solid. I‘m trying to determine if wife’s 6 Plus is okay. Still testing.

I’ve reported this bug several times to Apple, with diagnostic logs.

I have been having this same problem with my iPhone 7 plus. Its download speeds on Wifi are about one-third as fast as they should be. Uploads don't appear to be affected, but they top out at 20 Mbps, so it's really hard to say. My 12.9" iPad Pro does not experience any problems and gets full speed downloads and uploads.

I was hoping that iOS 11.1 would address the issue, but after upgrading, it seems even worse than before. Now I'm only getting 5 - 10 Mbps download speeds when they should be 150.

I had a case open with Apple about this, but the iPhone suddenly started working again, so we closed it. But ever since that one night that it started working correctly again, it's been back to its slow download speeds. I'm going to see if I can reopen the ticket.

Yeah my lag is back. ESP when accessing mail.

I even had the “type something and wait 5 seconds for it to show up” the other day. Something is delaying releasing something on my phone. My wife’s is still acting as it should.

Maybe I should wipe my phone, restore to factory and start again

Ironically, I have better results on 2.4GHz. Someone said earlier in this tread that Apple has problems with 5.0GHz...

I am going to reset my phone to factory setting this weekend when I have the time....