Any fix for the iPhone 6 "incorrect password" WIFI error?

This problem exists and has been repeated on all 2.4 GHz home or business networks. I have tried 14 different ones and got the same results. It's curious that 5G networks are actually working and stable. Assuming there's a 2.4 GHz encryption conflict between this vendor's WIFI chip and iOS 9.

The issue is iOS 9.1 through 9.3.1 and 2.4 GHz WIFI networks in the MG5X2LL/A series iPhone 6. Unfortunately, I have three of these in my home. We have two later models that are unaffected.

5 GHz connections seem to be stable so far.

On a side note, my Samsung Galaxy S7 Edge is rocking with zero issues.

Sweet lord. I'm the one who should be angry. Lighten up, Mr. Serious. Like "Zikzak" is a name you can trust.

I have tried all sorts of combinations of passwords and SSIDs on my 2.4 GHz wireless networks, thanks. Here's what I've gone through, for those of you playing along at home:

• lower case only SSIDs and passwords
• numeric only SSIDs and passwords
• combination of numbers and characters
• combination of capital letters and numbers
• combination of capitals, lower case, numbers
• combination of capitals, lower case, numbers, and symbols
• Results consistent across DLink, Netgear, Belkin, Linksys, Cisco and even a Watchguard Firebox. Like I said, I'm a pro, bro. There ain't no Zik in my Zak.

There's obviously a problem with the encryption module with iOS 9 and 2.4 GHz networks in the MG5X2LL/A series. It ain't working, and it ain't as simple as y'all think. It's a logic defect. Admit it - no one's perfect. Not Google, not Microsoft, not even Apple.

AGAIN, if you missed it, 5 GHz networks ARE working and stable.

ZikzakCorp wrote:

A professional with the Wi-Fi network name "Dingleberry?" Right.

<edited by user>

Contacted our ISP (AT&T) initially, since it was their router we were using when we first saw trouble, but it's not their problem and they do not have a solution. Surprisingly, they had received quite a few calls about this situation since iOS 9 was released. Since AT&T decided against offering fiber in my home area, I dumped them and switched to the cable provider, Bright House. Same problem. Except, Bright House has 5G bands on their wireless routers, and AT&T does not. I have a ridiculously large house with three independent 5G routers, but our kids live with other parents or at school sometimes who don't have 5G, and that ***** up my Verizon LTE data in a hurry.

I'm a software engineer and I have done technical writing, and I can usually figure this stuff out myself. But this one is beyond me. I have contacted Apple support, been to the Apple store, and spoke with every brilliant software and electronics engineer I know (there are quite a few here on Florida's Space Coast), and no one can figure this out. Apple recommended I replace or upgrade my three out of warranty phones, but that's silly, expensive, and not a fix. It's a software or logic bug. Apple could fix this, but since the 6 is now old tech and 7 is on the horizon, I suppose it's not cost-effective to invest any time or resources into it.

There is no Apple-sanctioned downgrade to iOS 8. Apple needs a Microsoft-like system-restore. Backups and resets all have failed.

Hoping this Hail Mary on the community boards might find someone else who knows more than I do. Looking for a miracle at this point...

Thanks for the tips. iOS 8 was perfect for us, no DNS problems, even with a substitute DNS. In iOS 9, can't even connect to the dang wireless 2.4 GHz network to get to DNS, so unfortunately, that's a moot point. It's the password or encryption authentication that's got everything jacked up. What's weird is they worked for a week or two with iOS 9, then pooped out. I didn't know there was an issue until I saw my cell plan data usage spike. Kids don't use BT or find my iphone. We reset network, reset phone, reset router, reset earth's magnetic field, nothing worked on any of these phones. 5G WIFI is still working at home, so we've got a temporary fix until the kid heads back to Mom's jacked-up 2.4 GHz WIFI.

We have three exact models bought the same day from the same Apple store. Level 2 probably can't fix this - it's most likely a hardware thing. I'd be really surprised if they replaced all 3 MG5X2LL/A phones. But again, thanks for the tip. You've been the most helpful yet.

Apple support responded to my tweet, so I patiently tried them again. They verified that I had the correct version of iTunes (irrelevant) and told me I'd have to take it into an Apple store for diagnostics, which may result in a repair of up to $299 since it's out of warranty. (I have THREE of these that have the same problem). And again, there is no way to roll back to iOS 8, which would fix this.

Anyone want to trade my iPhone 6 for an iPhone 5S or even a 5C?

Updated to iOS 9.3.2 last night, and still no connection to 2.4 GHz wireless networks.

Still no tips, words, or a fix from Apple. Still no way to roll this phone back to iOS 8, because apparently that is a crime.

And no, "pay $299 and trade your phone in" is NOT a solution.

I have at least a dozen, maybe more, customers in my repair business who have experienced a similar issue. Some have resolved, others have given up and upgraded. My kids tried my Samsung Gear VR on my S7 Edge, and it looks like they'll be skipping the iPhone 7 and leaving the Apple ecosystem. I really hoped Apple would step up to resolve this hardware conflict, but they didn't. Oh well.

Does anyone know why 5G wireless would work when 2G encryption fails? That's the really interesting thing.

We see that a lot, even with Macbooks, iPads, and PCs. One device develops an encryption error and refuses to connect to a wireless network until it's wiped and reset. It's an anomaly with no easy fix. This wasn't the case with these stupid iPhones. Tried SEVERAL different 2.4 GHz networks in various locations. The only thing that worked was 5 GHz wireless networks. It's a vendor bug in certain wireless chips that is incompatible with iOS 10.