If your iPhone is stuck on Preparing Update, first check whether you can still leave Settings and use the phone. A preparation delay inside Software Update needs a different response from an iPhone already installing iOS on the Apple-logo screen.
I would start with the screen you can see, available storage, and a fresh download if necessary. There is no universal 30-minute cutoff that proves the update is broken, and you do not need to erase your iPhone to retry it.
Check which update screen you are on
| What you see | What to do |
|---|---|
| “Preparing Update” inside Settings, with other apps still working | Keep the phone connected to power. If preparation remains unchanged through repeated attempts, check storage, restart normally, and replace the downloaded update. |
| An Apple logo and progress bar after installation begins | Allow installation to finish. Progress can appear slow or pause. Do not restart just because the bar has stopped moving briefly. |
The distinction matters because deleting a downloaded update is an option in Settings, while an installation already underway should be allowed to complete. Keep the iPhone connected to power during the update.
If the phone is usable, make a current iCloud or computer backup before further attempts. A backup is particularly important if this is not the first failed update.
Check storage before downloading the update again
Open Settings > General > iPhone Storage and let the storage breakdown finish loading. Look at the available space and any recommendations shown.
The download size is not a reliable measure of all the space an update needs. However, there is no fixed 15GB requirement for every iPhone and iOS release. Follow any storage warning shown by your device rather than treating an arbitrary number as a guaranteed fix.
For a safer cleanup, consider these options:
- Offload an app you can reinstall: Select it in iPhone Storage and tap Offload App. This removes the app itself while retaining its documents and data. Check the app size first: offloading will free less space than expected if most of its storage is documents and data.
- Remove replaceable downloads: Downloaded films, podcasts, or offline media can be useful candidates if you can obtain them again.
- Review large files individually: Save anything important elsewhere before deleting it. Avoid deleting files simply because a cleanup recommendation lists them.
Do not empty Recently Deleted just to clear an update “cache.” Those are actual photos and videos awaiting permanent deletion. Removing them is a data-loss decision, not a required update repair.
Delete the downloaded update and make a fresh attempt
If preparation repeatedly stalls while the phone remains usable, replacing the downloaded update is a reasonable next step. This does not prove the original file was corrupted; it removes the existing download so iOS can obtain another copy.
- Open Settings > General > iPhone Storage.
- Find the iOS update in the storage list. Its name should identify the version downloaded to your phone.
- Tap the entry, then choose Delete Update and confirm.
- Restart the iPhone normally. You can use Settings > General > Shut Down, then turn it back on with the side or top button.
- Connect to reliable Wi-Fi and power, then open Settings > General > Software Update to download the update again.
Apple includes this method in its guidance for an iPhone that will not update. If the update does not appear in iPhone Storage, do not delete unrelated files looking for it. Use the computer method below if the problem continues.
During the retry, watch for a change in the message or an error alert. “Unable to Verify Update,” a storage warning, and a frozen phone are different problems; the exact wording helps identify the next step.
Use a force restart only if the phone stops responding
A normal restart is preferable when Settings and the touchscreen still work. If the iPhone becomes unresponsive, a force restart can restart it without erasing your photos, apps, or other personal data.
For iPhone 8 and later, including iPhone SE (2nd and 3rd generation):
- Press and quickly release Volume Up.
- Press and quickly release Volume Down.
- Press and hold the Side button until the Apple logo appears, then release it.
Press the volume buttons separately and quickly. Holding several buttons together is not the same sequence. Older models use different combinations; follow the matching instructions in my force-restart guide for all iPhone models.
Do not use this as a routine interruption while an installation progress bar is advancing. If the phone repeatedly returns to the Apple-logo screen instead of starting normally, stop repeating the same restart and move to computer-assisted troubleshooting.
Investigate Wi-Fi when an update shows a connection error
“Preparing Update” alone does not prove your network settings are damaged. A connection check is more relevant if iOS reports that it cannot check for or verify an update.
Try another reliable Wi-Fi network before resetting anything. If you use a personal VPN, temporarily disconnect it and retry. For a work-managed iPhone, ask the administrator about update restrictions rather than removing management profiles.
If ordinary connectivity problems continue across attempts, a network reset may help. First make sure you have the Wi-Fi passwords needed to reconnect; my guide to finding saved Wi-Fi passwords on iPhone explains where to look.
Then use Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This removes saved network settings, including Wi-Fi connections and passwords and non-managed VPN settings. It does not erase your photos or apps. See what resetting iPhone network settings changes before proceeding.
Update through a computer if preparation keeps failing
A computer provides another update route when the same over-the-air attempt repeatedly fails. It still needs an internet connection and does not guarantee that every update error will disappear.
Use a data-capable cable that fits your iPhone: Lightning or USB-C, depending on the model. Unlock the phone and approve Trust This Computer if prompted. Make a backup before updating if you have not already done so.
On Windows: use Apple Devices
- Install or update the Apple Devices app, then connect the iPhone to the PC.
- Select your iPhone in the app’s sidebar.
- Open General and choose Check for Update or Update, depending on what the app displays.
- Follow the prompts and leave the phone connected until the process finishes.
Apple’s Windows update instructions for Apple Devices explain the supported process. iTunes remains relevant on older setups, but it is not the only Windows option.
On a Mac: use Finder
On macOS Catalina or later, open Finder, select the iPhone in the sidebar, and open General > Check for Update. Choose the available update and follow the prompts. Older Macs running macOS Mojave or earlier use iTunes instead.
Update and Restore are different actions. Updating is the option to try when you want to install iOS while retaining your data. Restoring erases the device. If recovery mode becomes necessary because the iPhone will not start, do not casually select Restore without understanding the consequences and checking your backup.
Confirm the update, or record the failure for support
After the iPhone restarts successfully, open Settings > General > About to check the installed iOS version. Then revisit Software Update to confirm whether another update is available.
If both a fresh download and a computer update fail, record the exact error, iPhone model, installed iOS version, available storage, and the stage where the attempt stops. Those details give Apple Support something specific to investigate. A factory reset should not be the automatic next step simply because preparation failed.
