You cannot delete an iOS update after Apple has installed it on your device
Once iOS installs an update, there is no built-in way to remove it. Apple does not provide a "downgrade" tool in Settings, and you cannot uninstall iOS the way you uninstall an app. If an update is causing problems — battery drain, app crashes, performance issues — your options are limited to troubleshooting the issue itself or restoring your device to factory settings, which erases everything.
However, if you have downloaded an update but have not yet installed it, you can delete the downloaded file to free up storage space and prevent the installation from happening automatically.
Key Takeaways
- Downloaded but not installed updates can be deleted from Settings > General > iPhone Storage to reclaim space and delay installation.
- Once iOS installs an update, you cannot remove it without erasing your entire device and restoring from a backup.
- If an update is causing problems, try restarting your device, clearing cache, or checking which apps are consuming battery before considering a full restore.
- Apple stops signing older iOS versions after a few weeks, so you cannot downgrade even if you wanted to — you can only move forward to newer updates.
How to delete a downloaded but not yet installed update
Open Settings and go to General. Tap iPhone Storage (on iPad, it says iPad Storage). Scroll down until you see an entry that says something like "iOS 18.2" or "Pending Update" — the exact name depends on which version you downloaded.
Tap that entry. You will see an option to Delete Update. Tap it, and the downloaded file will be removed from your device. This frees up the storage space the update was taking up and prevents your device from installing it automatically overnight or when you plug in to charge.
If you do not see a pending update listed, the update has already been installed, and this method will not work.
Why you might want to delay an update
The first few days after Apple releases an iOS update, some users report bugs — an app that crashes, a feature that drains battery faster than before, or a setting that does not work as expected. If you delete the downloaded update, you buy yourself time to see whether other users are reporting problems before you install it yourself.
You can check Apple's support forums, Reddit communities like r/ios, or tech news sites to see whether the update has widespread issues. If problems emerge, you can wait for Apple to release a point update (like 18.2.1) that fixes them. If no major issues appear after a week or two, you can let the update install normally or manually trigger it yourself by going back to Settings > General > Software Update.
What to do if an update is already installed and causing problems
Restart your device first. Many performance issues resolve after a restart. Hold the power button and either volume button until the power-off slider appears, then slide to power off. Wait 30 seconds, then power back on.
If the problem persists, try clearing the cache for the app that is misbehaving. Go to Settings > General > iPhone Storage, find the app, tap it, and select Offload App. This removes the app but keeps your data. Then reinstall it from the App Store. This often fixes crashes or freezing without losing your account information.
If battery drain is the issue, go to Settings > Battery > Battery Health & Charging and check the Maximum Capacity percentage. If it is below 80%, your battery itself may be aging. Check Settings > Battery > Battery Usage to see which apps are consuming the most power. Some apps may need updates from the App Store to work efficiently with the new iOS version.
When you might need to restore your device
If troubleshooting does not fix the problem and the update is severely affecting your device's usability, you can restore your iPhone or iPad to factory settings. This erases everything on the device but keeps you on the same iOS version you are currently running — it does not remove the update.
To restore, connect your device to a computer with Finder (Mac) or iTunes (Windows), select your device, and choose Restore. You will be asked whether to restore from a backup or set up as new. Restoring from a backup will reinstall your apps and data, but it may also reinstall whatever was causing the problem if the issue was in your backup. Setting up as new gives you a clean slate but requires you to sign back into accounts and reconfigure settings.
Before you restore, back up your device. On newer iPhones, go to Settings > [Your Name] > iCloud > iCloud Backup and tap Back Up Now. On older devices or if you prefer a computer backup, use Finder or iTunes.
Why Apple does not let you downgrade iOS
Apple stops signing older iOS versions a few weeks after releasing a new one. "Signing" is Apple's way of certifying that a version is legitimate and safe to install. Once a version is unsigned, you cannot install it, even if you have the file. This is a security measure — it prevents people from staying on older, more vulnerable versions of iOS indefinitely.
This means you cannot go back to iOS 18.1 once you have installed iOS 18.2, even if 18.2 is causing problems. Your only path forward is to wait for the next update or restore your device, which keeps you on your current version but does not move you backward.
Frequently Asked Questions
Can I stop iOS from updating automatically?
Yes. Go to Settings > General > Software Update > Automatic Updates and turn off "Download iOS Updates" and "Install iOS Updates". Your device will no longer download or install updates on its own. You will see a notification when updates are available, and you can install them manually whenever you choose.
What if I delete the downloaded update and then change my mind?
Go back to Settings > General > Software Update, and your device will download the update again. You can then install it normally. There is no penalty for deleting and re-downloading.
Will deleting a downloaded update affect my data or apps?
No. Deleting a downloaded update only removes the installation file. Your apps, photos, messages, and settings remain untouched. The update has not been installed yet, so nothing on your device changes.
Is it safe to stay on an older iOS version?
Not long-term. Older iOS versions have security vulnerabilities that newer versions patch. Apple eventually stops supporting older versions entirely, and apps may stop working on them. Delaying an update by a week or two is fine, but staying on a version that is months old exposes your device to known security risks.