iPhone keeps disconnecting from WiFi

Actually i tried this already in older IOS version like 9 and 10. It didn't help. Yesterday I upgraded my phone to 11.2.5 and fortunately your trick works.
I realize that this issue just happen with wireless which have captive portal authentication. It my environment, user must login via the authentication portal everyday. If we turn off autologin it won't pop up the portal automatically. Anw, i'll tell user try that trick. And when they want to login, just turn autologin on, and then turn it off after connected. Thank you.

I am glad that it worked for you!

One more thing to add, my wireless SSID for both 2G & 5G was the same name, I have noticed the wifi disconnect again even if auto login is off, so I had to give different names!

I have the same issue, but since 3 days. My iPhone is disconnecting from the wifi every minute, ex:LTE, HomeWIFI, LTE, HomeWIFI, etc.... I rebooted the network, tried different setting, renamed my SSID, Installed iOS 11.2.5 (after the problem appears), I restarted and cleaned the memory of my iPhone, etc.... I noticed that the WIFI is low and high by moment without explanation. I also needed to re-enter the password on my known network's. I have two other iPhones in the same house, but neither shows this behavior. Other computers, phones and printers stay connected. It seems to be a software or a hardware troubleshooting. Does anyone have clues ?

If you have the same problem on any other wireless router (friend wifi, public wifi or try hotspot), I guess then it will be most likely hardware issue!

If not, then you need to work on from your router end.

try to set the DNS to manual instead of auto!

Hope it will be resolved soon!

I have a iPhone 6+ and when I have iPhone problems instead of going to the discussion page for iPhone answers what I do is very simple I call Apple Care and its free for me and the number for Apple Care is 800-692-7753. Apple Care has 9 levels and if level 1 can't help you solved the issues you are having then ask for level 2 and so on to level 9 is the highest. If the issue comes back again then call Apple Care and give your case number to the first person who answer your call. Problem solved.

Please check your wifi network is selected as home network or public network

1) If it’s selected as home network then it will not get disconnected after a network reset

2) if it’s selected as public network as per IOS a safety feature and battery saver option kicks in which allows the wifi to connect only when you are using your cell.

Hope it works

Regards

Khurshed

I just had to deal with this problem, after getting a message I had chewed through $60 of prepaid data and now $0! Never had this happen in 5yrs until I did the update!

After much searching I found the ‘auto join’ suggestion....which was off. Since activating this for my home wifi so far no problems and using my home wifi rather than the small data allowance I have.

Wish i knew this may happen before the update!

Unfortunately this did not work for me. I'm pretty savvy with home networking and followed your (solid) suggestion to the letter. Upon rebooting of my router and reattaching my iPhone to the network I did get a new IP address assigned, so I'm certain I did everything I could. Five minutes later my 6s (on 11.2.6) dropped off the network and continued to do so.

I truly believe this is an Apple issue and I hope it is resolved soon.

I have only one Question that when this problem will be resolved ? I just faced this problem tonight, its keep on disconnecting autonatically but when i tap settings and then Wifi it connects automatically :( that bad experience please resolve it as soon as possible, as apple is my first and last love ever !!

I think not the phone is the problem but rather your router settings. I had the same issue, but also on iOS 10. I’ve changed the router’s wireless channel bandwith to a specific one not to auto (mine can work on : 20MHz/40MHz/Auto). I set to 40, worked like a charm.

I have the very same problem with my iPhone and my iPad. I am in contact with Apple support. I am able to reproduce this problem by pressing the power button. After a few seconds of standby, the WiFi connection is gone. This is not a problem with the router.
a.) It is reproducable in other environments

b.) Other devices (non iOS) remain connected

The problem exists with 5GHz as well as with 2.4GHz.

For testing I have turned auto-reconnect off.

It seems (but I have to test that again to confirm) that open WiFis (w/o WPA2) are a lot more stable on iOS devices.

Cheers,

Clifford

I have had this problem on my mini iPad since the time I upgraded to iOS 11.

I’v tried everything and nothing worked. But I’v noticed that it may connect nicely only to the wifi network that hasn’t ever connected to my iPhone!!

It’s really crazy thing

Hey, so I’ve got the same issue and the link that you sent didn’t help me because it only mentioned if I’m unable to connect to the wifi but my issue here is that one I’m connected to the Wifi and use it for a long time or put it on sleep next to me everytime I open it up again I see my cellular data on instead of my Wifi logo ...

Thank you . (Iphone7)

Hi, thank you for your article. I have the same problem. I’ve done everything the article suggests and it’s still disconnecting. Not only from my home WiFi but from any WiFi. I used all my data in one week without realising. I believe this is an IOS problem and I hope it gets sorted ASAP. Thank you.

An Update from Apple support. After a conversation and a structured report, on what is happening, Apple suggested that it must be a hardware issue and that I should send in my phone or go to an Apple store. My suggestion that it is rather unlikely that different devices (iPhones and iPad) simultaniously decide to have the exact same hardware issue didn't raise any eyebrow on the other side of the phone line. Nor did the fact that I can actually reproduce this problem with my iOS 11.2 devices. I will not spend the time and take my device to an Apple store, where I have to start all over again by reproducing the phenomenon. It could be a broader 11.2 issue, judging by similar posts. Unfortunately Apple doesn't seem to be interested in our problems or our help in locating the cause. Too bad...