What's new in iOS 26.6.2?

iOS 26.6.2 contains a single fix: it resolves an issue that prevented iPhones from downloading a software update over a cellular connection. Apple's release notes list nothing else. The build number is 23G90, and iPadOS 26.6.2 ships the same fix for iPads.

Does iOS 26.6.2 include security fixes?

No. Apple's security releases page lists iOS 26.6.2 and iPadOS 26.6.2 with no published CVE entries, meaning Apple documented no security content for this build. The security update in this cycle was iOS 26.6.1, released on August 17, 2026.

Which iPhones and iPads can install iOS 26.6.2?

iOS 26.6.2 runs on iPhone 11 and later. iPadOS 26.6.2 covers iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later.

Should I install iOS 26.6.2 if I am waiting for iOS 27?

Yes, and that is the main reason it exists. Without this fix, a device on iOS 26.6.1 may be unable to download iOS 27 over mobile data when it arrives. Installing 26.6.2 now over Wi-Fi means the cellular download path works later.

How do I update if my iPhone will not download over cellular?

Connect to a Wi-Fi network, since the bug only affects cellular downloads, then go to Settings, General, Software Update. Alternatively connect the device to a Mac and update it from Finder, or use the Apple Devices app on Windows. Check that mobile data downloads are enabled under Automatic Updates too.

iOS 26.6.2 Fixes Cellular Software Update Bug

What the bug actually did

Apple's release notes describe it in a single line: the update fixes an issue that prevents downloading a software update over a cellular connection. In practice, anyone on iOS 26.6.1 who was away from Wi-Fi and tried to pull a new build down over 5G or LTE could be left staring at a download that never started.

That is a minor annoyance in isolation. The timing is what makes it worth patching now rather than folding into the next big release.

Why Apple shipped it the day before the iPhone event

Apple's fall event runs on September 9 at 10am Pacific, and iOS 27 is expected to reach the public shortly after it. If the cellular download path were still broken across the installed base, a large number of people would hit the wall on the exact day they went looking for iOS 27 — on a phone, on mobile data, with no computer nearby.

Pushing 26.6.2 out first means most devices carry the fix before that rush begins. Apple has not given an iOS 27 release date, and the company rarely does before the event itself, so treat any specific day you see as an estimate.

Which devices get it

Apple lists the same eligibility as the rest of the iOS 26 cycle:

iPhone: iPhone 11 and later
iPad Pro: 12.9-inch 3rd generation and later, 11-inch 1st generation and later
iPad Air: 3rd generation and later
iPad: 8th generation and later
iPad mini: 5th generation and later

There is no companion release for Mac, Apple Watch, Apple TV or Vision Pro this time. macOS Tahoe stays on 26.6.2 from August 17, and nothing new appeared on Apple's developer releases page alongside the iPhone and iPad builds. This is a rollout worldwide, not a staged regional one — if your device is on the list, the update is available to you.

No security fixes in this one

Apple's security releases page lists iOS 26.6.2 and iPadOS 26.6.2 with no published CVE entries, which means the company documented no security content for the build. That is a real difference from iOS 26.6.1 three weeks ago, which was a security release, and from iOS 26.6 in July, which closed close to 90 flaws.

So there is no urgency here on security grounds. The reason to install it is purely practical: it restores a path you will probably want next week.

How to install it, and what to do if you are stuck

Open Settings, tap General, then Software Update. iOS 26.6.2 is a small update and installs like any point release.

If you are the person the bug affected and the download will not begin, you have two ways around it:

Join a Wi-Fi network. The bug is specific to cellular downloads, so Wi-Fi is unaffected.
Update through a computer. Connect the iPhone or iPad to a Mac and update it from Finder, or use the Apple Devices app on Windows.

Also worth checking: in Settings under General, Software Update, Automatic Updates, the toggle for mobile data downloads has to be on for cellular updating to work at all. And if you are running an iOS 27 beta rather than iOS 26, this update does not apply to you — beta builds follow their own track.