How to Undo an Update on iPhone: Step-by-Step Guide

Updating your iPhone can sometimes lead to unexpected issues like app incompatibility, battery drain, or performance slowdowns. If you recently updated your iPhone and want to revert to a previous iOS version, you might wonder how to undo that update effectively.

This guide explains how to undo an update on iPhone by downgrading iOS using official and practical methods. You'll learn step-by-step instructions, prerequisites, troubleshooting tips, and best practices to safely manage your device's software version.

What prerequisites are required for undoing an update on iPhone?

Compatible computer: You need a Mac or Windows PC with the latest version of iTunes or Finder to interact with your iPhone for restoring firmware.
Stable internet connection: Downloading the correct iOS firmware files requires a reliable internet connection to avoid corruption.
Backup of your data: Before undoing an update, ensure you have a complete backup via iCloud or iTunes to prevent data loss.
Signed iOS version: Apple only allows downgrading to iOS versions that are still signed; check current signing status before proceeding.
Basic technical knowledge: Familiarity with putting your iPhone into recovery or DFU mode is essential for restoring firmware.

Is it possible to undo an update on iPhone?

Yes, it is possible to undo an update on iPhone by downgrading to a previous iOS version, but only if Apple is still signing that version. Apple stops signing older iOS versions shortly after new releases, limiting downgrade options.

Downgrading requires manually downloading the older iOS firmware file (IPSW) and restoring it using iTunes or Finder. This process erases your device, so having a backup is critical. Undoing an update helps when a new iOS version causes bugs or compatibility issues.

However, if Apple has stopped signing the older iOS version, you cannot downgrade officially. In such cases, you may need to wait for a future update or explore other troubleshooting methods.

How do you check if an iOS version can be downgraded?

To check if you can downgrade your iPhone to a previous iOS version, you must verify if Apple is still signing that version. Apple signs iOS versions to allow installation and verification on devices.

You can check signing status using websites like ipsw.me. This site lists all iOS versions and indicates which are currently signed for your iPhone model.

For example, if you want to downgrade from iOS 17 to iOS 16.6, visit ipsw.me, select your iPhone model, and see if iOS 16.6 is marked as signed. If it is, you can proceed with the downgrade. If not, downgrading is not possible through official means.

Step-by-step guide to undo a update on iPhone

Step 1: Backup your iPhone data

Backing up your data is crucial before undoing an update because the process erases your device. Use iCloud or iTunes/Finder to create a full backup.

Connect your iPhone to Wi-Fi and go to Settings > [your name] > iCloud > iCloud Backup > Back Up Now

This command initiates an iCloud backup. Alternatively, use iTunes or Finder on your computer to back up locally. This ensures you can restore your data after downgrading.

Step 2: Download the correct IPSW file

Download the iOS firmware file (IPSW) for the iOS version you want to downgrade to. Make sure it is signed by Apple.

Visit https://ipsw.me/ > Select your iPhone model > Download the signed IPSW file

This step gets the exact firmware file needed for restoring your iPhone to the previous iOS version.

Step 3: Put your iPhone into Recovery or DFU mode

Recovery or DFU mode allows iTunes/Finder to restore your iPhone firmware. The method varies by iPhone model.

For iPhone 8 and later: Press and quickly release Volume Up, then Volume Down, then hold Side button until recovery mode screen appears.

Entering recovery mode prepares your device for firmware restoration. DFU mode is deeper and used if recovery mode fails.

Step 4: Restore iPhone using iTunes or Finder

Open iTunes (Windows/macOS Mojave or earlier) or Finder (macOS Catalina or later). Connect your iPhone and select it.

Hold Option (Mac) or Shift (Windows) and click Restore iPhone. Select the downloaded IPSW file.

This command tells iTunes/Finder to restore your iPhone with the selected firmware instead of the latest version.

Step 5: Wait for the restore process to complete

The restoration will erase your iPhone and install the older iOS version. Your device will restart when done.

After this, you can restore your backup to recover your apps and data.

Step 6: Restore your backup

Once your iPhone is running the older iOS, restore your data from the backup made earlier.

In iTunes or Finder, select Restore Backup and choose your latest backup.

This step recovers your personal data, settings, and apps after downgrading.

What are common errors when undoing an update on iPhone and how do you fix them?

"This device isn’t eligible for the requested build": Occurs when the IPSW file is not signed by Apple. Fix by downloading a signed IPSW version.
iPhone stuck in recovery mode: Try forcing a restart or use DFU mode to restore the device.
iTunes/Finder not recognizing iPhone: Update iTunes/Finder and your computer’s OS, then reconnect the device.
Restore process freezes or fails: Check USB cable and port, try a different computer, or disable security software temporarily.
Data loss after downgrade: Ensure you have a valid backup before starting the process to avoid permanent data loss.

What are best practices when undoing an update on iPhone?

Always backup before downgrading: Prevent data loss by creating a full backup on iCloud or your computer.
Use official IPSW files: Download firmware only from trusted sources like ipsw.me to avoid corrupted or malicious files.
Check Apple signing status: Confirm the iOS version is still signed to ensure successful downgrade.
Keep your software updated: Use the latest iTunes or Finder version to avoid compatibility issues during restore.
Be patient during restore: The process can take time; avoid disconnecting your iPhone until it completes.

What alternatives exist if you cannot undo an update on iPhone?

If Apple no longer signs the older iOS version, you cannot downgrade officially. Alternatives include:

Waiting for Apple to release a new update that fixes your issues.
Resetting your iPhone to factory settings and setting it up as new to resolve update-related bugs.
Contacting Apple Support for assistance or visiting an Apple Store for hardware diagnostics.
Using third-party tools cautiously for jailbreaking or downgrading, though these carry risks and are not recommended for most users.

How do you prevent issues when updating iPhone in the future?

To avoid needing to undo updates, follow these tips:

Wait a few days after a new iOS release to ensure stability and compatibility.
Read user feedback and reviews about the update before installing.
Keep regular backups to quickly recover if problems occur.
Update apps and check for compatibility before upgrading iOS.
Ensure sufficient battery and storage space before starting an update.

Conclusion

Undoing an update on iPhone involves downgrading to a previous iOS version using recovery or DFU mode with iTunes or Finder. This process is only possible if Apple still signs the older iOS firmware. Backing up your data beforehand is essential to avoid loss during the restore.

Developers and users should use this method to fix issues caused by new updates or compatibility problems. Always verify signing status, use official IPSW files, and follow best practices to ensure a smooth downgrade experience.

FAQ

Can I undo an iPhone update without a computer?

Undoing an iPhone update requires restoring firmware, which currently needs a computer with iTunes or Finder. There is no official way to downgrade iOS directly on the device without a computer.

Will undoing an update delete my apps and data?

Yes, restoring an older iOS version erases your iPhone. You must back up your data before downgrading and restore it afterward to recover apps, settings, and files.

How long does it take to undo an iPhone update?

The downgrade process typically takes 15 to 30 minutes depending on your internet speed, computer performance, and iPhone model. Restoring backups may add extra time.

Is it safe to undo an iPhone update?

Undoing an update is safe if done correctly using official IPSW files and Apple-signed versions. Always back up your data and follow instructions carefully to avoid bricking your device.

What if Apple stops signing the iOS version I want to downgrade to?

If Apple stops signing the older iOS version, you cannot downgrade officially. You will need to wait for a new update or seek other troubleshooting methods to resolve issues.