How to Fix Error 1109 When Restoring iPhone or iPad

Restoring an iPhone or iPad should be a straightforward process, but sometimes unexpected errors can interrupt it. One such issue is Error 1109, which appears in the middle of the restoration process and prevents the device from completing the update. Many users encounter this error when using a Mac or Windows computer to restore their iPhone or iPad, only to find that their device becomes unusable, as iOS is no longer installed. The full error message reads:

“The iPhone ‘iPhone’ could not be restored. An unknown error occurred (1109).”

This error typically occurs if your computer is unable to communicate with Apple’s software update server. A network issue, firewall restrictions, or server downtime could be preventing your system from verifying the necessary iOS files.

If you’re facing this issue and can’t even turn on your device, don’t worry—there are steps you can take to fix it. In this guide, we’ll go over what causes Error 1109 and how to restore your iPhone or iPad successfully.

1. Update Your Mac, iTunes, or Apple Devices on PC

Before attempting to restore your iPhone or iPad again, ensure that your computer is running the latest software. An outdated system or application may prevent proper communication with Apple’s servers, leading to Error 1109.

• On Mac: Go to System Settings > General > Software Update, and install any available macOS updates. If you’re using an older macOS version with iTunes, make sure iTunes is up to date by opening it and checking for updates.
• On Windows (Using iTunes): Open iTunes and go to Help > Check for Updates to install the latest version.
• On Windows (Using Apple Devices App): If you’re using the Apple Devices app instead of iTunes, ensure you have the latest version by checking the Microsoft Store for updates.

Once your software is updated, try restoring your iPhone or iPad again.

2. Check for Network and Security Software Issues

Error 1109 can occur if your computer is unable to communicate with Apple’s servers due to network restrictions, firewall settings, or security software interference. To resolve this, follow these steps:

Ensure Your Internet Connection is Stable

• Open a web browser and visit macReports website to confirm you have an active internet connection.
• If you’re experiencing slow or unstable connectivity, restart your router and modem or contact your Internet Service Provider (ISP) for assistance.

Check Firewall and Security Software Settings

• Some firewalls, VPNs, or security software may block Apple’s software update servers.
• Temporarily disable any third-party security software and try restoring your device again.
• If disabling security software resolves the issue, adjust its settings to allow access to Apple’s update servers.

Bypass Your Router (If Needed)

Some routers may interfere with iTunes or Finder’s ability to access Apple’s servers. Try these steps:

1. Disconnect from Wi-Fi and use an Ethernet cable to connect your computer directly to your modem.
2. Restart your computer and modem to refresh the connection.
3. Attempt to restore your iPhone or iPad again.

Once your network connection is verified and security software settings are adjusted, try restoring your device to see if the error is resolved.

3. Try a Different Computer and Internet Connection

If you’re still encountering Error 1109, the issue might be specific to your computer or network. To rule this out, try restoring or updating your iPhone or iPad on a different computer and internet connection.

• If you’re using a work or school network, restrictions may be in place that prevent communication with Apple’s update servers. Try restoring your device at home or on a personal network.
• If possible, use a friend’s or family member’s computer to attempt the restore. Ensure that their Mac or PC is updated and running the latest version of macOS, iTunes, or the Apple Devices app.
• Try using a mobile hotspot from your iPhone or another device to bypass potential router restrictions. This can help if your home or office network is blocking Apple’s servers.

If switching computers or networks resolves the issue, the problem likely lies with your original setup—such as security settings, firewall rules, or router restrictions. Once you’ve successfully restored your device, you can reconnect it to your primary computer and network as usual.

4. Change DNS Settings to Google DNS

In some cases, changing the Domain Name System (DNS) settings to Google’s public DNS can help resolve Error 1109.

How to Change DNS on Windows 11

1. Open Settings and go to Network & Internet.
2. Click on Wi-Fi (or Ethernet if using a wired connection).
3. Select Hardware properties and scroll down to DNS server assignment.
4. Click Edit, choose Manual, and enable IPv4.
5. Enter the following Google DNS addresses:
   • Preferred DNS: 8.8.8.8
   • Alternate DNS: 8.8.4.4
6. Click Save and restart your computer.

How to Change DNS on macOS

1. Open System Settings and go to Wi-Fi (or Network if using Ethernet).
2. Click Details next to your connected network.
3. Select the DNS tab and click + to add new DNS servers.
4. Enter:
   • 8.8.8.8
   • 8.8.4.4
5. Click OK, then Apply to save the changes.

After changing the DNS settings, restart your computer and try restoring your iPhone or iPad again.

5. Restore Using the Apple Devices App on Windows

If you’re using a Windows computer, try restoring your iPhone or iPad using the Apple Devices app instead of iTunes.

How to Install and Use the Apple Devices App for Restoration

1. Open the Microsoft Store on your Windows PC.
2. Search for Apple Devices.
3. Select the Apple Devices app and click Get to download and install it.
4. Once installed, open Apple Devices, connect your iPhone or iPad, and follow the on-screen instructions to restore your device.

If you were previously using iTunes and encountered Error 1109, switching to the Apple Devices app might resolve the issue.

6. Restore Using 3uTools (Alternative Method)

If you’re still unable to restore your iPhone or iPad, try using 3uTools, a third-party tool designed for managing and flashing iOS devices.

How to Restore Using 3uTools

1. Download and install 3uTools from their official website.
2. Connect your iPhone and enter Pro Scan Mode in 3uTools.
3. Follow the instructions to enter DFU mode and select an IPSW firmware file.
4. If you encounter Error (-75) related to battery health, go to Smart Flash, check Fix Battery Health, and proceed with the restore.

While this is a third-party solution, it has helped many users resolve stubborn iOS restore errors.

See also:

• The iPhone could not be restored. An unknown error occurred (9) or (4013)
• iPad Could Not Be Restored, an Unknown Error Occurred (4045), How to Fix
• Boot Camp Error “The Startup Disk Cannot Be Partitioned Or Restored To A Single Partition”