All About iPhone or iPad cannot be synced due to an unknown error -39

The iPhone and iPad have become essential tools for many individuals, serving as a personal assistant, communication device, and entertainment hub. However, even these advanced devices are not immune to technical issues, with one of the most frustrating being the unknown error -39 during syncing. This error can prevent users from updating, backing up, or syncing their device, causing inconvenience and frustration. In this article, we will delve into the causes and potential solutions for this error, helping users troubleshoot and resolve the issue.

iPhone or iPad cannot be synced due to an unknown error -39

If you are trying to sync your iPhone or iPad with your computer and are encountering an unknown error -39, you are not alone. This issue is quite common and can be frustrating, but there are several steps you can take to resolve it.

1. Check your internet connection
The first thing to do is check your internet connection. If your device is connected to the internet, but the error persists, try switching to a different Wi-Fi connection or using a cellular data connection. Sometimes, a weak or unstable internet connection can cause syncing issues.

2. Update your device and computer
Make sure that both your iPhone or iPad and your computer are running on the latest versions of their software. Outdated software can often cause syncing problems and updating to the latest versions can resolve the issue.

3. Restart both devices
Sometimes, a simple restart can fix unknown error -39. Try restarting both your device and your computer and then attempt to sync again.

4. Remove any third-party security software
If you have any third-party security software installed on your computer, it may be causing the syncing error. Try temporarily disabling or removing the software and then attempt to sync again.

5. Update iTunes
Make sure you have the latest version of iTunes installed on your computer. If you are not using the latest version, it can cause syncing problems.

6. Check your USB connection
Ensure that you are using an original USB cable. Using a third-party cable can sometimes cause syncing issues. Also, try using a different USB port on your computer.

7. Reset network settings
If none of the above steps work, you can try resetting the network settings on your device. This will erase all saved Wi-Fi networks, so you will have to reconnect to them again.

8. Restore your device
If the error still persists, you may need to restore your iPhone or iPad. Make sure to back up your device before restoring it, as this will erase all data on your device.

If none of these steps work, the issue may be with your device’s hardware. In this case, you should contact Apple support for further assistance.

Unknown error -39 is a common syncing issue, but it can be resolved by following the above steps. Make sure to keep your software and devices updated and use original cables to prevent such errors in the future.


In conclusion, dealing with unknown errors such as -39 when trying to sync your iPhone or iPad can be frustrating and time-consuming. However, by following the steps mentioned in this article, you can troubleshoot and resolve the issue on your own. It is essential to keep your device updated and have a stable internet connection to avoid encountering such errors in the future. Additionally, staying in touch with Apple Support and seeking professional help when needed can also be beneficial. Remember, these errors can be fixed, and with a little patience and perseverance, you can get your iPhone or iPad synced successfully!

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