How to Fix iTunes Error 28

When using iTunes to restore or update your iOS device, you might get an alert saying something like “The iPhone could not be restored. An unknown error occurred (28)”. After reading this post, you’ll fix iTunes Error 28 and get your device back to full working order.

By iMobie | Posted on: Aug. 30, 2018, Last Updated: Aug. 30, 2018
Home > PhoneRescue > iOS Repair Tool > How to Fix iTunes Error 28

iTunes Error 28 occurs when there is a hardware glitch during the update or restore process. In order for a successful restoration or update, information is transferred between your device and your computer which creates a successful backup of your data and enables you to install the latest software. Error 28 prevents these things and means your device is not functioning properly.

iPhone could not be restored. An unknown error occurred (28)

iPhone could not be restored. An unknown error occurred (28)

Why iTunes Error 28 Happens

Error 28 can be caused by several issues, including missing dynamic link library (DLL) files, incompatible drivers for your iOS device, corrupt system files, problems with a virus or spyware program or apps that have been incorrectly installed. The error can cause your computer to perform slowly, other errors to pop up, restricted app access and even the Blue Screen of Death.

How to Fix iTunes Error 28

We’ve assembled a list of the best ways to fix iTunes Error 28, in order of importance.

1. Update Your iTunes

Install the latest version of iTunes to help fix common glitches. You can download the latest version from the official website. Alternatively, install by going through iTunes.

For PC Users:

Step 1: Open iTunes and go to the menu bar.

Step 2: Click Help > Updates

Step 3: Follow instructions to get the latest version of iTunes.

For Mac Users:

Step 1: Go to the App store on your Mac.

Step 2: Click on Updates.

Step 3: Update any iTunes or MacOS updates that you see there.

2. Check Your Connectivity

Sometimes hardware connectivity could be the problem. If the USB you’re using to connect your device to your computer isn’t working properly, the computer won’t be able to sync properly.

Step 1: Check you are using a genuine Apple cable – the one that came with your device. You can buy a certified cable online.

Step 2: Check the port.

Step 3: Check the cable.

Step 4: Check the connector.

Step 5: Check the connection to your computer is solid – if the connector is moving around you might have a problem.

Step 6: Make sure the device connection is secure and remove anything that might in its way (eg. your phone case).

3. Restart Everything

Restart your computer and load up iTunes again. You can also restart your phone to help get rid of Error 28. You can also perform a hard reset on your iPhone by holding down the Home button and the Off button for 10 seconds. The screen will go black and you’ll see the Apple Logo light up before restarting.

4. Check Your Security Software

If updating to the latest iTunes doesn’t help, another reason for Error 28 could be your security software. Follow these steps to make sure your computer isn’t preventing iTunes from working properly.

Step 1: Go to your security software and check that you can see iTunes in the list of exceptions.

Step 2: Check that your Firewall allows iTunes through.

Step 3: Restart or reinstall your security software if necessary.

5. Restore Device to Original Settings

Sometimes Error 28 won’t go away unless you fully restore your device to its factory settings.

Step 1: Backup your data.

Step 2: Connect your device to your computer with the original cable.

Step 3: Click on your device on iTunes.

Step 4: Go to Summary > Restore and confirm. Your device will update and automatically restore.

6. Get in Touch with Apple

If you still need assistance for how to fix iTunes error 28, contact the Apple support team and they will be able to help.

7. Restore iPhone with iCloud or iTunes Alternative

To restore iPhone, if you aim to restore the iPhone to the original factory settings, you can have a try to restore iPhone with iCloud. If you mean to restore data from iTunes backup, you can with the aid of iTunes alternative tool and here is a step-by-step tutorial: How to Restore iPhone from iTunes Backup >

The Bottom Line

We hope you’ve found these solutions helpful for getting rid of Error 28, and that you get your device and iTunes working properly again in no time.


Member of iMobie team, an Apple fan as well as an anime lover. Like to share solutions on iOS and Android related problems.