iPhone 17 Pro Max Wi-Fi dropping after iOS 26.4 update

Not sure if you've resolved this, but i had the same Wi-Fi issue and was able to fix it.

I'm on a iPhone 15 Pro Max, iOS 26.4

TLDR: i went into the iPhone's Wi-Fi settings and set the device IP address to manual.

I tried this because i noticed in my wifi settings, the IP address my iPhone was getting dynamically via DHCP was not in the same IP range as my home network.

I manually entered an available IP address, set subnet to 255.255.255.0, and Router IP accordingly.

The same method fixed my iPad Pro (wifi only model) from disconnecting as well.

Not sure if this will work for everyone, but hope this helps.

I had this same issue and it resolved by deleting the VPN from my iPhone, even that it was not active, now the wifi works correctly

“iPhone 17 Pro Max Wi-Fi dropping after iOS 26.4 update”

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To the OP and ALL those Affected:

Report this to Apple:

Do your Part: Provide Apple with feedback on this, letting them know about this issue.  Apple may not get back to you directly, but the more feedback they receive on this, the more they will know what is occurring, and what bug fixes to include in updates to come. Apple will know nothing of this, if you don't report it to them.

1. Go Here: Feedback - iPhone - Apple
2. Select: "Bug Report" for the "Feedback Type"
3. Comment: that this all began after installing an update. Include the URL of this thread.
4. Proceed from there as necessary

“WIFI sync is also broken on ios 26.4. Reported by third party software developers as well.”

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Renewal of Services:

Well that’s great to hear that they reported it; but you should do so, yourself.

If you connect to Wifi, doesn't necessarily mean you are connected to the internet. --> Internet not available WiFi and Cellular … - Apple Community

Wi-Fi Assist is on by default. This will automatically switch to Cellular Data if the device is not connected to the internet.

About Wi-Fi Assist - Apple Support

I conducted a thorough search of this forum using the term 'WiFi after iOS' and uncovered numerous posts detailing similar issues across various iOS updates. This suggests that iOS updates may not consistently be the root cause. Below are a handful of examples extracted from over 4,000 search results:

"After iOS 17.4.1" will be an addition to this list posted by you.

• loss of wifi after upgrade to ios 17
• Wi-Fi won't connect after iOS 16.6 update
• IPhone stuck on “choose a wifi network” after upgrading to iOS 15
• Problem with Wi-Fi after iOS 16 update
• broken wifi after IOS 14.5.1 update
• Cannot connect to wifi after updated to ios 15.3.1
• Iphone 7 Wifi Not Working After IOs update
• iPhone X software update error after iOS 16.5 on wifi.
• no wifi access after iOS 17.0 download

When you attribute every glitch or slowdown, or feature availability on your device to an iOS update, you risk overlooking other potential causes that may be specific to your hardware or settings. Updates often become the “easy scapegoat,” but not all issues originate from the operating system itself. 

I’ve been having the same problem since upgrading to my 17 ProMax. Doesn’t matter which WiFi, Home, work, neighbors. I disconnect, even deleted, Nord VPN. No change. Turn off Wifi and Goto the towers and immediate connection. The problem isn’t consistent but it’s a problem enough that I now usually run with WiFi off. I’m completely up to date with OS updates

Help Please

note. My 17proMax is straight from Apple and it directly replaced my IPhone 11 Pro on the AT&T network. I had no problems with my 11Pro

Hi everyone,

Before the iOS 26.4 update, my iPhone 17 was connected to Wi-Fi 7. Now it only connects to Wi-Fi 6. The connection is stable. In contrast, my wife's 16 Pro Max remains on WiFi 7 after the update. I reported this to Apple and Ubiquiti Support. I left my home network setup untouched.

WIFI sync is also broken on ios 26.4. Reported by third party software developers as well.

WiFi Drop issues are not always the fault of the iOS update!  Many things can cause phone problems.  If you tell people you think it's an iOS update, it might make it harder to fix or find a solution for the real issue.

Remember, the right question often leads to the solution!

Was/Is your device Jailbroken? If that's the situation, please be informed that attributing the issues to iOS updates may not be accurate.

iOS updates aim to enhance user experience, boost security, and fix bugs rather than disrupt core features. The majority of the issues after updates might stem from underlying, unmentioned factors. Updates won't typically alter personal data but may refine settings or features. Backup before major updates for safety. Review Apple's update details and backup advice for a smooth process.

Kindly consider checking your settings and addressing any device issues before attributing the issue to external factors. This could be a pure coincidence that the iOS update affected the iPhone functions.

Before initiating a standard iOS update, it's advisable to create a backup. Have you completed this step? If yes, proceed with the restoration from the backup.

See what each update does: OS — iOS 26, About iOS 18 Updates, About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...

When you attribute every glitch or slowdown, or feature availability on your device to an iOS update, you risk overlooking other potential causes that may be specific to your hardware or settings. Updates often become the “easy scapegoat,” but not all issues originate from the operating system itself. 

Also happen to me. Just after 26.4 update. Before everything normal and no changes in router/iphone except the iOS update. Tried everything but no success.

I have iPhone 17 pro

Same here after iphone update, wifi keeps disconnecting after update. Network reset does not help.

Wife has the same device and did not update, no issues for her.