Tips 1: Check iTunes Version
No matter for updating IOS on the iPhone or restore the iPhone, they'll all needs to use the latest iTunes version. If the iTunes reports unknown error 53 during the iPhone XS restoring, first we need to check iTunes version.
For MacBook users, please open iTunes software and select iTunes from menu on the MacBook, tap "Check for Updates", if the update is available, then please follow simple steps to update the iTunes to latest version.
For Windows users, please open iTunes and select Help from menu on computer, tap "Check for Updates", if the update is available, then please follow the simple steps to update the iTunes to latest version.
After finish the update, please restore the iPhone XS again, if the unknown error 53 still exist, please try next solution.
Tips 2: Restart Computer
If there are some problems on the computer, it also will cause iPhone get iTunes error. For many simple software problems, you can fix it by restarting.
Please press the power button on the computer to power down it completely, after few minutes, please press the power button on the computer to power on it. When the computer is turned on, please restore the iPhone XS again, if the unknown error 53 still exist, please try next solution.
Tips 3: Check iPhone lightning cable and USB port
If the iPhone lightning cable or USB port is damaged, it will cause a failure connection between iPhone XS and computer. We need to check iPhone lightning cable and USB port to make sure they are in good condition.
Use a good quality iPhone lightning cable, try to restore it again, if it's not working, then we can try difference USB port or try another computer. If the error 53 still exist, that means it's not the problem of the iPhone lightning cable or USB port, we should try next solution.
Tips 4: Force restart iPhone XS
Some damaged software or crashed Apps will cause iPhone XS failed to restore and get an unknown error 53. Luckily, for these simple software problems on iPhone, we can solve it by restarting.
Please quickly press and release the iPhone Volume Up button, and quickly press and release the iPhone Volume Down button, and then please press and hold the iPhone power button until the Apple logo appears again, finally release the buttons.
Now, connect iPhone XS to the computer to restore again, if you still get an unknown error alert, try next solution.
Tips 5: Reset All Settings on iPhone XS
The iPhone setting problems also can cause iTunes error; we can try to fix it resetting all settings. Reset all setting won't erase any information on your iPhone XS, such as the photos, videos, files, etc.
In order to reset all setting on the iPhone XS, please go to Settings-> General-> Reset-> Reset all settings. After the reset, the iPhone XS will automatically restart.
Now we can restore the iPhone XS again, if it still doesn't work, then we can contact Apple for help.
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