What to do if iOS 16.4 update fails

During the process of updating the iOS system, sometimes there may be updates that fail, which may cause some inconvenience to users. Especially when updating to the latest iOS version 16.4, users may become more anxious and uneasy if they encounter an update failure. So, what if the iOS 16.4 update fails? Don't worry, let's take a closer look at the possible causes and solutions to help users easily solve the issue of failed updates.

What to do if iOS16.4 update fails

Check if the device supports iOS 16

If the device is not compatible with iOS 16, you may receive the message 'Unable to install update - error occurred while installing iOS 16'.

Therefore, first ensure that your device is on the support list.

Free up iPhone storage space

When updating iOS, it usually takes up a lot of storage space, and "Unable to install update - error occurred when installing iOS 16" is usually caused by insufficient memory.

Open [Settings] - [General] - [iPhone Storage Space] to check the usage of iPhone storage space, and then update it again when there is sufficient memory.

Check if the network is stable

Due to the long time required for iOS updates, it is important to ensure network stability to avoid interrupting the update process and causing iPhone updates to fail.

Open [Settings] - [Infinite LAN] and select the WiFi with the best network connection.

Force iPhone restart

Forced restart can be used to repair some basic iOS system faults, including stuck black screen, recovery mode, and other basic iOS system faults, and can be attempted first.

Choose different forced restart operations for different iPhone models:

Full screen models (iPhone 8 and later): Quickly press the volume up and down buttons, then continue to press the on button until the Apple logo reappears after the device goes black, and then release all buttons;

Delete updated firmware package

Delete the downloaded updated firmware package to address the issue of updates being overdue due to long download times and unable to be updated again.

Open [Settings] - [General] - [iPhone Storage] and find "Update" in the app list. Click on 'Update' and then click on 'Delete Update'.

Open [Settings] - [General] - [Software Update] again, ensure that the network is good and there is sufficient memory, download the update package, and update the iOS system again.

Update with iTunes

ITunes, as Apple's official data management tool, can also be used to update the iOS system.

But the operation is relatively complex, and there are many error prompts and update failures.

The above is all about what to do if the iOS 16.4 update fails. The editor has provided various solutions for you to try one by one. However, the most common situation of update failure is when there is insufficient memory or when the test version has been updated. Simply free up enough memory and delete the files of the test version to upgrade normally.