Q: wifi doesn't work with IOS 7

Hi, just want to share my experience in obtaining a replacement 4S that was 6 months out of warranty.

I contacted AppleCare under the exception option for IOS7 after submitting iphone diagnostics online and explained to the operative the issue of greyed out wifi and all the stuff I tried to correct it.  He confirmed that according to the diagnostics the wifi should be fine, but my battery was draining too quick,  I then told him I would like to submit a claim under consumer law for a replacement or repair as the device was clearly faulty from day one. 

I was then transfered to a lady that deals with "consumer law" claims, she was confident the 4S would be replaced but that I would have to go to an Apple store so they can check that there was no water damage.  She made detailed notes and scheduled an appointment at the genuise bar.  Arrived next day at the genuise bar and gave them a copy of the email she sent with the case reference number and 10 min later I walked out with a replacement 4S.  I decided to sell the handset and upgraded to a 5S, did not want to take a chance the same thing would happen after updating to IOS 7.

The above should work for most in the EU, I'm based in the UK http://www.apple.com/uk/legal/statutory-warranty/

I can not fault Apple in sorting out my issue, everyone was very polite and helpful, just be polite yourself, clear and determined in what you want.

Hello fellow iphone users.  I had all the problems you had and tried everything except putting the phone in the freezer.  Part of me wants to do it to try it but the other part of me thinks that once I do and then take it out, the moisture will start to build internally and then Apple will say it was my fault placing the phone in the freezer.  I have an appointment at Fairview Mall in North York, ON with one of the "genius'" so I'll let you know what transpires with this.  After reading everyone's problem I don't think they'll have a solution.  Fingers crossed.

Yes your Right , Putting the phone in the Freezer will cause moisture inside the phone once it's taken out ,.

Not a good idea !

Same WLAN and bluetooth problem since 8 months with my 4s (23 months old)!  The first time it appears directly after an iOS 6.1.x - update.

The dryer-method work for almost 3 weeks. Then I have to repeat the procedure.

Yea, great solution if you live near an Apple store and live in Europe with European consumer law backing you up and have time to waste going through the Apple maze. The company needs to admit the problem and create and announce it has an avenue for replacement for all affected users worldwide.

Same here in Greece..

We don't have an official Apple Store here so the Service business is handled by the 3 mobile companies.. Wind, Cosmote, Vodafone...

I send the Iphone4s in the Service department and returned it with a moisture problem.. It is this special kind of moisture that only affects the wi-fi chip, while leaving every other phone function intact..

They asked  210 euros as repariment fee!

Instead of the 210 they are about to get a nice, well documented query from the local consumer protection agency.

Nice going there Apple! 

Do you honestly think that anyone (besides those facing severe mental disorders), will ever again trust another IOS donwload?

Do you honestly think that I (and many hundreds of thousands globally) will EVER buy another Apple product after this ordeal?

Guarantee or no Guarantee, admitting or not, shoving the head in the sand or not, paying or not paying for a replacement..

DO YOU REALLY BELIEVE YOU WANT BE AFFECTED BY ALL THIS??

Already switched to another mobile company and certainly another phone... Enough with the i-klain-main overexpensive BS, you are selling...

Will come back with the results of the consumer protection query...

My wifi also stopped working after updating my ios (on Iphone 5)

I followed this and it worked:

" Some people have reported success by putting the iPhone into Airplane mode and then going to Settings > General > Reset > Reset Network Settings, but the problem may return. "

Which I found at this link: http://www.digitaltrends.com/mobile/ios-7-problems/

Theres some other suggestions available also.

The same problem with my 4S - WiFi does not work. I have tried all the available suggestions to fix on the web. But no luck it does not work.

Apple you're doing it in unprofessional way.

I have the same problem with my iPhone 4s (wifi doesn't work with IOS 7)

I upgraded a few weeks ago from iOS 6...something to iOS 7.0.0 - nothing special happened. Then a few days later upgraded to 7.0.1, to 7.0.2, to 7.0.3 and yesterday finally to 7.0.4.

I realized that all of a sudded I didn't get contact to any internet address.

I checked the IP config - no IP address - ups - by the SID of my WiFi router is visible

I checked the protocol on the DHCP server - the iPhone didn't send a DHCPREQUEST at all. So, there is no reason for the server to send as an answer an IP address :-) server is doing what he is supposed to do.

If I configure a fixed IP address on my iPhone -> all fine

I would call that (very) poorly tested software

To : WA Schaly,

That makes sense. But did you also see the DHCP Discovery message from the iPhone?

If the dhcp discovery message didn't come from the iPhone, then there may not be a dhcp offer from the dhcp server, and therefore no dhcp request.

From http://en.m.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol

A DHCP client can also request its last-known IP address (in the example below, 192.168.1.100). If the client remains connected to a network for which this IP is valid, the server may grant the request. Otherwise, it depends whether the server is set up as authoritative or not. An authoritative server will deny the request, making the client ask for a new IP address immediately. A non-authoritative server simply ignores the request, leading to an implementation-dependent timeout for the client to give up on the request and ask for a new IP address.

Could it be that both the client and server are in a state where they are waiting for each other, ie, the server is waiting for the iPhone to make another ip request but the iPhone isn't aware of this, and keeps on waiting.

And after a wifi router is not successfully logged into after many tries, I wonder if there is power saving routines in iOS 6 and 7 to mask out that wifi router's SSID?

I say so because recently, I noticed that all of my neighbor's wifi router SSIDs no longer show up on my iPhone's wifi selection list. They used to show up, but recently I noticed that they're not appearing anymore. And when my own wifi is turned off, I see no wifi at all. Doesn't this appear to be similar to what some of the people are seeing? We have people complaining that even though they can enable wifi, but no SSIDs can be seen.

My guess is that ios7 may have some kind of optimization code that will hide those wifi routers that we never log into, or, mask those wifi routers that are below a threshold of reception strength.

Now, if our own router and iPhone has a dhcp handshaking problem for extended period, what if there is code in ios7 that thinks this is a wifi router that we don't log into? And decides to mask its appearance in the wifi selection list.

This is just my hunch. We'll need someone who knows Ios7's wifi log in code to know the true and full story.

The visibility of the iOS update issues has hit the funnies.  See today's (Nov 23rd - Seattle Times) comic strip - "Zits" by Jerry Scott and Jim Borgman:

Alternative dude:  "I am holding the most amazingly sophisticated piece of technology in the world."  holding a smartphone in his hand

Next panel same dude:  "No, wait.... NOW I'm holding...      NO,WAIT.... hand on a sec...

Next panel same dude: "NOW I'm.... Oh, shoot...."

Lead teenage character - under his breathe:  "iOS updates are murder."

The suspicion is, of course, that one of the authors/drawers has just had an iOS 7 "event" of some sort.

There is basicly _nothing_ on the WiFi (wire :-) )

neither a DHCPDISCOVER nor a DHCPOFFER nor a DHCPREQUEST nor a DHCPACK and so on and so forth ...

I don't wanted to bore you to death with the protocol details but wanted to pointout the issue.

I traced the network using tcpdump on the DHCP server

The iPhone does not request _anything_

Does not get any respons (what would be corect)

No request no answer no IP address since iOS 7.0.4

My iPad2 wifi worked after initial download of ios7 but now only functions if I'm in the same room as my router.  it worked fine inside the Apple store, therefore the genius bar could not diagnose it (and of course had "never heard of this problem").  Gave me a free Apple Care call and naturally they had  never heard this complaint before either.  Despite the store employee telling me full diagnostics would be run nothing of the kind happened.  Apple Care told me to contact Comcast and have them update firmware on my router.  Even as a non-technical person that didnt sound right to me but I called Comcast anyway and of course sounded like an idiot.

Oh, also in the Apple store I asked why photos disappear on my iPhone (also ios7) as soon as I take them.  That got a shoulder shrug and a vague response about data corruption and guess what - they can't fix it!

Like everyone else on these threads I've been an Apple booster until this ios7 fiasco and the refusal of Apple to even acknowledge the problem.  I'm asking for a Surface for Christmas.

For those on this thread with the problem of the greyed out wifi, I have the solution and it's insane. But it works.

This video gives the instructions:

http://www.youtube.com/watch?v=4mVkiU2jNSE&feature=youtu.be

Basically, you overheat the phone with a hair dryer until it says it's too hot. It might take 5 minutes. Then put it in the fridge for 10. And wifi is back.

I just did it tonight. It worked. From comments on the video, it looks like it's a permanent fix.

I don't believe that iOS7 killed the wifi chip, I believe there is a deep bug on the software/hardware interface level that even exists on the diagnostic level. This overheating tricks that bug and allows the OS to see the chip as "healthy."

That's my only (layman) explanation. If the problem was truly hardware based, this solution could not work.

Just try it and if it works, pass it along. The guy who made the video deserves an award.