Before installing a newly announced iOS release, check whether your iPhone supports it, make and verify a fresh backup, and connect to power and Wi-Fi. Then review the update details in Settings > General > Software Update and install when you’re ready. Apple’s current guidance covers iOS 27; supported models and available versions are release-specific, so check Apple’s live compatibility information before proceeding.
Will your iPhone get the update?
Compatibility depends on both your iPhone model and the iOS release. Apple says Software Update shows only versions compatible with your device. Open Settings > General > Software Update to see the installed version and whether an update is offered.
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Apple’s iOS 27 compatibility page lists iPhone 11 and later, including iPhone SE (2nd generation and later), as compatible with that release. That is a release-specific list, not a promise about future iOS versions. Check Apple’s page again for the release you plan to install; if it says an earlier update is required, install that first.
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Back up your iPhone and verify the backup
Make a fresh backup before updating. Apple recommends backing up first, even though its iPhone User Guide says that updating to the latest iOS leaves data and settings unchanged. Choose iCloud or a computer; Apple does not establish one method as universally better.
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Back up with iCloud
- Open Settings > [your name] > iCloud > iCloud Backup.
- Tap Back Up Now and stay connected to Wi-Fi while it runs.
- Confirm the latest backup date and time shown below the control before moving on.
If the backup cannot complete because there isn’t enough iCloud storage, follow the on-screen options or use a computer backup instead. For automatic iCloud backups, Back Up This [Device] must be on, and the iPhone should be connected to power and Wi-Fi with its screen locked.
Back up to a computer
Apple also supports backing up to a computer. Its instructions use Finder on a Mac with macOS Catalina or later, and iTunes on an earlier macOS version or Windows. Follow Apple’s iPhone and iPad backup guidance for the steps that match your setup.
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Prepare power and Wi-Fi
For a wireless update, connect your iPhone to a power source and a Wi-Fi network before starting. A charging cable is one option if you need a way to connect the phone to power; match its connector to your iPhone. Apple notes that VPN or proxy connections may prevent the device from contacting its update servers, so try a suitable connection without them if the update cannot be reached.
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- Go to Settings > General > Software Update.
- Check the available version. Tap More Details to see the version number and update details.
- If you’re ready, tap Download and Install and follow the on-screen steps.
Apple’s wireless update instructions are at Update your iPhone or iPad. The page does not give a universal installation-time estimate, so allow time for the download and installation rather than planning around a fixed duration.
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Choose automatic installation if it suits you
Apple’s automatic installation option runs overnight when the iPhone is charging and connected to Wi-Fi, and sends a notification before installation. You can also allow an automatic download and install the update yourself later. If you prefer to choose the timing, use the manual steps above.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.If the update is missing or your iPhone needs more space
The update does not appear
First check the compatibility list and Software Update screen. If a compatible update still does not appear or wireless updating is unsuitable, Apple says you can update using a computer: Finder on macOS Catalina or later, or iTunes on earlier macOS or Windows.
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Your iPhone says it needs storage
If prompted, you can allow iPhone to temporarily remove apps to make room. Apple says those apps are reinstalled automatically after the update. If you don’t want to use that option, cancel and remove content manually before trying again. Apple’s reviewed instructions do not specify a universal amount of free space needed; the prompt on your device is the relevant guide.
Quick Recap
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Apple’s update and backup guidance
- How to download iOS 27 (Apple Support)
- Update your iPhone or iPad (Apple Support)
- How to back up your iPhone or iPad with iCloud (Apple Support)
- Update iOS on iPhone (Apple iPhone User Guide)
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