What Causes the “Update Error 4000” on iPhone?
After receiving numerous reports from multiple users, we decided to investigate the issue and devised a set of solutions to fix it completely. Also, we looked into the reasons due to which it is triggered and listed them as follows. Now that you have a basic understanding of the nature of the problem, we will move on towards the solutions. Make sure to implement these in the specific order in which they are presented to avoid conflicts.
Solution 1: Downloading Updates Directly
If the error is being triggered while downloading the updates from iTunes, you can try to download them directly on the mobile. For that:
Solution 2: Updating iTunes
In some cases, the error is triggered if iTunes is outdated. Therefore, it is recommended to update your iTunes application to the latest version. For that:
Solution 3: Uninstalling MS Store iTunes and installing through IPSW
If both the above methods don’t work, we can try using the Apple website’s version of iTunes instead of the MS Store one and install the iOS using IPSW directly.
Tip:
Another workaround that we came across was where users were able to bypass the update error by turning off auto-lock and turning off Facial Recognition before continuing with the update process. If the update process was successful, you can always revert the changes back.
Solution 4: Charge your mobile more than 50%
If the error is being triggered when your iPhone’s battery level is lower than 50% you should try charging it above that 50% mark which seems to fix this issue for many iPhone users. Check to see if you can install the updates after charging your iPhone more than 50%.
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