After i updated Iphone 7 to iOS 12, my wifi connection become very slow.
I tried reset network, reboot routers nothing help
Speedtest get me result 12 MB, on pc in same lan i have 80 MB
On Iphone 5s with iOS 11 i have 30<MB
iPhone 7, iOS 12.0.1
Hey. Not sure if your problem is solved. I am a Network Eng so not to explain how many hours I wasted t-shooting this.
After all what help me was a hard reboot! ( on iphone 8 and higher > vol up > then vol down > then power till you see the mighty Apple logo).
Done!
I agree that the issue is iOS. We have multiple apple devices at home (and many non-apple as well). The only ones that are slow are those running iOS 12.1 and above. In fact, the slowest devices are those on iOS 12.1.4. They are fine on 4G though.
We do have network congestion (though not too bad on the 5GHz bands) as every apartment in our condo has at least 1 wifi ssid. But android, Windows and Linux devices are able to cope. And, as I mentioned above, those iDevices not on 12.1.4 behave better.
I have also noticed that the iOS 12 devices make many more DHCP IP lease requests than any of the other devices. As the lease period on my network is 24 hours, I find this very odd behaviour.
Before anybody suggests I reconfigure my router, please note that I'm not doing that for the 3 devices not working correctly (when they did work fine before updating) as the rest of my devices work fine.
Written on my iPhone 8
A drop like that sounds like an interference or signal strength-induced drop to a 2.4 GHz network from a 5 GHz one.
its definitely not a universal issue.
If your WiFi speed is dropping that much over time, it's almost certainly due to interference in your environment from other devices or other WiFi networks.
When you reconnect, speeds will start off high until errors accumulate, at which slower speeds will be attempted to see if the connection is more reliable at slower speeds.
Update to iOS 12.1.1 didn't solve the problem.
Same thing happens on iMac late 2009 with macOS High Sierra 10.13.6 - sometimes wifi drops from 300Mbps to 2Mbps, reconnect helps. Really tired of this wifi issue on Apple...
Same here. It is clearly related to something on the phone. It does not happen with other devices in the same room. And, it happened almost overnight. I was getting 150mbps, now just 30mbps on wifi. We have Xfinity, fwiw, but since other devices (including apple) are ok, It lesds me to believe it is something that happened in an update.
Nothing help, last update doesn't help.
After rebooting wifi works fast, but after few hours, wifi speed drop to ~1,2 mbs
But after rebot speed goes to ~50, 60 mbs
I have this problem on different routers, on different iphone 7.
It's not a problem of my router, it's problem if iOS 12
But other devices work fine, for example Apple TV 3gen. And signal strength is maximum on iMac.
I've noticed the following pattern - when iMac wakes up, it everytime reconnects to wifi and speed is 300 Mbps. But sometimes, when iMac wakes up, it shows that it already connected to wifi, and when this happens, wifi speed drops to 2 Mbps. I can't understand why iMac sometimes saves wifi connection when goes sleep, but in most cases it disconnects.
For my wife and I it's only our iPhones that are slow on wifi. We both have MacBook Pros that are fine on wifi and we both have iPhone SE's that start out fast after forgetting the network and reconnecting but the speed will plummet to 1-2mbps very quickly.
Thanks, Less. Nothing has worked: turned wifi on and off, forgot network then rejoined it, rebooted phone, reset network settings, rebooted router, changed dns server to 8.8.8.8.
I posted this problem to my Facebook wall amd many of my friends, all over the country, are having the same issue.
There is no inherent slowness in iOS.
iOS may deal with interference sightly differently than your other devices, but as seen in my post directly above yours, there's no inherent slowdown when conditions are good.
So I think we are agreed that iOS wifi works well in perfect conditions, but not in poor conditions. Other devices (including Mac) handle poor conditions much better. As I live in a condo, there is little I can do to fix the conditions, but iOS could handle it better.
I’m having exactly the same problem since I’ve updated to iOS 12.1.4. WiFi connection is slow Like never before. Can’t be the environment nor the router configuration because other devices work just as fine as my iPhone used to.
Please help us solve this problem
Once again, that sounds like an environment with lots of interference on WiFi frequencies.
iOS 12 wifi very slow
