You can stop an iPhone update before it finishes, but your options depend on which stage it's in
If your iPhone is downloading an update, you can cancel it from Settings before installation begins. If the update is already installing — you'll see a progress bar and "Installing iOS" on screen — you cannot stop it safely. Forcing the phone off during installation risks leaving it in an unusable state. The update will complete, though you can try a force restart if it gets stuck for more than an hour.
The practical difference matters: a cancelled download wastes no time and leaves your phone untouched. A forced shutdown during installation may require connecting to a computer and using Apple's recovery tools to restore the phone, which takes much longer than letting the update finish.
Key Takeaways
- You can cancel a download-in-progress from Settings > General > Software Update, but only before the "Install" button appears.
- Once installation starts and the progress bar appears, stopping it mid-process can corrupt your phone's system and force a full restore.
- If an update is stuck installing for over an hour, a force restart (not a regular shutdown) is safer than waiting indefinitely.
- Scheduled updates set for nighttime can be cancelled the same way as manual downloads, up until installation begins.
- If your phone becomes unresponsive during an update, you will need a computer with Apple Configurator 2 or iTunes to recover it.
Cancelling a download before installation starts
Open Settings, tap General, then tap Software Update. If the update is still downloading, you'll see a progress bar with a percentage. Tap "Cancel" or swipe left on the update card (on some iOS versions) to stop the download. The update file will be removed from your phone, and you can use your device normally.
This is the only stage where cancellation is truly safe. Once you cancel, the next time your phone checks for updates — usually daily — it will find the same update again. You can cancel it again if you want to delay further.
What happens if the update is already installing
If you see "Installing iOS" on your screen with a progress bar, the update is no longer a file you can delete. It's actively rewriting your phone's system files. Turning off the phone, force-restarting it, or pulling the power (if somehow plugged in) interrupts this process and can leave your phone unable to boot.
The safest action is to let it finish, even if it takes an hour or more. Most installations complete within 15 to 30 minutes. If the progress bar hasn't moved in over an hour, a force restart is the next step, but understand that this carries risk.
How to force restart if an update is stuck
A force restart is different from a normal shutdown — it forces the phone to restart immediately without waiting for apps to close. The button sequence depends on your iPhone model.
On iPhone 8 and newer: Quickly press and release the Volume Up button, quickly press and release the Volume Down button, then press and hold the Side button until you see the Apple logo (usually 10 to 15 seconds). Do not release when you see "slide to power off" — keep holding until the Apple logo appears.
On iPhone 7 and 7 Plus: Press and hold the Volume Down button and the Side button together until the Apple logo appears.
On iPhone 6s and earlier: Press and hold the Top (or Side) button and the Home button together until the Apple logo appears.
After the restart, your phone will continue the update installation. You have not cancelled it — you've only restarted the process. The update will still complete.
Preventing unwanted updates from installing automatically
iPhones can be set to install updates automatically, usually overnight when plugged in and on Wi-Fi. You can turn this off to have more control over when updates happen.
Go to Settings > General > Software Update > Automatic Updates and toggle off "Install iOS Updates" and "Install Security Responses and System Files." Your phone will still notify you when updates are available, but it won't install them without your action.
If you've already scheduled an update for a specific time, you can cancel it the same way you'd cancel any download: go to Settings > General > Software Update and tap Cancel before the installation progress bar appears.
Recovering a phone that won't restart after a failed update
If you forced a restart during installation and your phone now shows only the Apple logo, a loading screen, or a red exclamation mark, the system files were interrupted. Your phone needs to be restored using a computer.
On a Mac with Apple Silicon (M1 or newer), open Apple Configurator 2 (free from the App Store). On an Intel Mac or Windows PC, use the latest version of iTunes. Connect your iPhone with a USB cable. The computer should recognize the phone and offer to restore it. Choose "Restore" and let the process complete — this will reinstall iOS from scratch and take 15 to 45 minutes depending on your connection.
This is why letting a stuck update finish, even if it takes longer than expected, is almost always faster than forcing a restart and then restoring.
Delaying an update you're not ready for
If an update is available but you want to wait before installing it, you have options. You can ignore the notification and cancel downloads as they appear. iOS will keep offering the same update until you install it or until the next major iOS version is released.
Alternatively, if you have an Apple Developer account, you can enroll in the public beta program to test upcoming versions before they're released to everyone. This gives you more control over timing, though beta versions are less stable than final releases.
For most people, the practical approach is to cancel downloads when they appear, use your phone normally, and install the update when you have time and your phone is charged — usually a few weeks after release, once any major bugs have been reported and fixed.
Frequently Asked Questions
Can I cancel an update if my iPhone is locked?
No. If your phone is locked with Face ID or a passcode, you cannot access Settings to cancel a download. You'll need to unlock it first. If the update is already installing (progress bar visible), you cannot cancel it at all — you can only wait or force restart.
Will cancelling an update delete my photos or data?
Cancelling a download will not affect your data. Cancelling an installation in progress (by force restart) risks corrupting the system, but your photos and files are stored separately and usually survive. A full restore using a computer may erase everything, so back up first if possible.
What if I cancel the update and then my phone asks to update again immediately?
Your phone checks for updates daily and will find the same one again. This is normal. You can cancel it again. If you want to stop seeing the notification, go to Settings > General > Software Update and toggle off automatic updates.
Does cancelling an update affect my phone's security?
Delaying an update means you don't have the latest security patches, but your phone remains functional. If you're concerned about security, install the update at your next opportunity. Cancelling one update does not prevent future updates from being offered.
Can I cancel an update on an iPhone that's not mine?
Only if you know the passcode or have Face ID access. If the phone is locked, you cannot reach Settings. If it's a family member's phone, ask them to unlock it and cancel the update themselves, or wait for the installation to complete.