Stay on iOS 26 or Update to iOS 27? How to Choose Safely

If your iPhone is still on iOS 26, the Software Update screen changed on you: since October 8, iOS 27 is the big button and the iOS 26 update is tucked away at the bottom. You don’t have to upgrade yet, but you do need to install something to stay protected. This guide explains both paths, how to pick, and the one mistake you can’t undo.

Before you start: this guide is based on what Apple offers as of mid-October 2026 (iOS 27.0.1 and iOS 26.7.1). Version numbers change every few weeks, and the exact wording of some buttons can vary slightly by iOS version and language.

What changed on the Software Update screen

According to MacRumors, starting October 8, 2026, iPhones running iOS 26 show iOS 27.0.1 as the main update in Settings > General > Software Update. The iOS 26 update, iOS 26.7.1, now sits in a smaller section called Also Available at the bottom of the screen.

Until then it was the other way around: the iOS 26 update was the featured one and iOS 27 was the optional extra. Apple isn’t forcing anyone to upgrade, but the new layout makes it easy to tap the wrong button if you aren’t paying attention.

The two versions you can choose from

Apple’s security releases page lists both updates with the same release date, September 28, 2026:

	iOS 26.7.1	iOS 27.0.1
What it is	Security fixes for iOS 26	First bug-fix update for iOS 27
iPhones	iPhone 11 and later	iPhone 11 and later
New features	None	Everything new in iOS 27
Where to find it	Also Available section	Main update at the top
Can you go back?	Yes, you can still move to iOS 27 later	No, Apple no longer lets you return to iOS 26

Two details are worth knowing:

Every iPhone that runs iOS 26 can also run iOS 27. Apple lists iPhone 11 and later for both. So for iPhone owners, this is a real choice, not a hardware limit.
iOS 26.7.1 is a security update you shouldn’t skip. BGR reports that it patches a CoreGraphics flaw that Apple says “may have been exploited in an extremely sophisticated attack.” If you’re staying on iOS 26, this is the version you want.

Option 1: Stay on iOS 26 (and keep getting security fixes)

This is a good choice if you rely on an app that hasn’t been updated for iOS 27 yet, you use your iPhone for work and can’t afford surprises, or you simply want to wait for a few more bug fixes.

Back up your iPhone first: Settings > [your name] > iCloud > iCloud Backup > Back Up Now.
Plug in your iPhone and connect to Wi-Fi.
Go to Settings > General > Software Update.
Don’t tap the iOS 27 button at the top. Scroll down to Also Available.
Tap iOS 26.7.1 (or the newest iOS 26 version listed there).
Tap Download and Install (on some versions it says Update Now), enter your passcode and wait for the iPhone to restart.
When it’s done, go back to Software Update and check that it shows iOS 26.7.1 as installed.

Turn off automatic install so iOS 27 doesn’t sneak in

Apple’s support page says that with Automatically Install on, your iPhone installs updates overnight while it’s charging and on Wi-Fi. Apple doesn’t clearly state whether that would include a jump to iOS 27, so if you want to stay put, the safe move is to control updates yourself:

Go to Settings > General > Software Update > Automatic Updates.
Turn off Automatically Install for iOS updates.
You can leave Automatically Download on; it only downloads in the background and you still decide when to install.
Apple also offers a separate System Files option in this menu for small updates that improve features without changing your iOS version. You can leave that one on.

From now on, check Software Update every couple of weeks and install the newest iOS 26 version from Also Available.

How long will iOS 26 get security updates?

Apple hasn’t announced an end date. History gives a hint, though: after iOS 26 came out in 2025, Apple kept releasing iOS 18 security updates, and Macworld and Six Colors reported that iOS 18.7.7 was pushed to all iOS 18 devices as late as April 2026.

There’s an important catch. Apple has acknowledged in the past that only the current iOS version gets every known security fix, and it still recommends that compatible devices move to the newest version. Think of staying on iOS 26 as a few months of breathing room, not a permanent plan.

Option 2: Update to iOS 27 without surprises

iOS 27 has been out since September 14, 2026, and iOS 27.0.1 already fixed some early problems. According to reports on Apple’s release notes, those fixes included unexpected restarts on iPhone 18 Pro models when Face ID failed, and a touchscreen freeze that could happen when opening Notification Center and Control Center at the same time.

Back up first. This matters more than usual, because you can’t go back to iOS 26 (see below).
Update your key apps in the App Store, especially banking, work, and authentication apps.
Plug in your iPhone and connect to Wi-Fi.
Go to Settings > General > Software Update and tap the iOS 27 update at the top.
Tap Download and Install and enter your passcode.
If you get a message saying the update needs more space, Apple says you can tap Continue to let the iPhone temporarily remove apps, which it reinstalls afterward. Your data stays.

Give your iPhone a day or two after updating. It’s common for battery life and performance to feel off while the system finishes indexing in the background.

What about the new Siri?

The rebuilt Siri is the headline feature of iOS 27, but MacRumors reports that you have to join Apple’s waitlist to get access, so updating doesn’t mean you’ll have it on day one. Some Apple Intelligence features also require newer iPhone models. If the new Siri is your main reason to update, check that your model supports Apple Intelligence before you decide.

You can’t go back to iOS 26

This is the part that catches people off guard. 9to5Mac reported that on September 21, 2026, Apple stopped signing iOS 26.6.2, and that iOS 26.7 doesn’t offer an iPhone restore image. In practice, that means once your iPhone is on iOS 27, there’s no official way back to iOS 26.

Be careful with websites and paid tools that promise to “downgrade iOS 27 to iOS 26.” Apple’s servers decide which versions can be installed, and third-party tools can’t legitimately override that. A failed restore can also erase your iPhone.

Which one should you choose?

If you…	Our pick
Depend on an app that isn’t ready for iOS 27	Stay on iOS 26.7.1 for now
Use your iPhone for work and need stability	Stay on iOS 26.7.1 and revisit after iOS 27.1 or 27.2
Want the new features and your apps are up to date	Update to iOS 27.0.1
Are buying a new iPhone soon	It will come with iOS 27 anyway, so updating your old one doesn’t matter much
Haven’t updated anything in months	Install at least iOS 26.7.1 today

Our recommendation

Whatever you choose, don’t stay on an old version of iOS 26. If you’re not ready for iOS 27, open Settings > General > Software Update, scroll to Also Available and install iOS 26.7.1 today, then turn off Automatically Install so the big jump happens on your terms. If your apps are up to date and you have a fresh backup, iOS 27.0.1 is a reasonable time to make the move. Apple has said the iPhone Duo, which goes on sale October 23, ships with iOS 27.1, so that update is expected around then and is another sensible checkpoint if you’d rather wait.