Computer turned off while updating iphone
Free up more storage space by deleting unwanted apps, photos, videos, cache, and junk files etc.
To remove unwanted data follow Settings Storage & i Cloud Usage and tap Manage Storage.
This usually only works if the issue is related to the i Phone battery indicator not properly showing the charge remaining. Try step 2: The next step is to restore the device as new, then restoring from a backup, but only do this after you’ve made a backup of everything on the i Phone.
However, if the update process is interrupted due to power cut or an error fails to update i OS, you may lose your existing i Phone data.
It is best to secure your data in i Tunes or i Cloud as backup before updating your i Phone to the latest i OS version.
Instead of directly downloading the software on your i Phone, update via i Tunes on a computer.
Steps to update i Phone via i Tunes ‘i Phone software update failed’ error can also appear if your mobile does not have enough space for latest i OS files.
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Some i Phone users have experienced a very annoying issue; their i Phone will randomly turn itself off, despite having battery charge remaining.