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Can't update IOS via itunes

Hi Guys, i unable to update my 12 pro max via itunes. During flashing the IOS 14.3, message error was popup "Could not be updated. An unknown error occurred(4000)''. 2 times and same error message was popup on my pc windows.. Hope can explain to me and i new apple user...Thanks

iPhone 12 Pro Max, iOS 14

Posted on Dec 15, 2020 3:38 AM

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Posted on Dec 15, 2020 7:07 AM

Hi TT2, issue was solved after tried to waiting for couple of hour and re download the IOS and updated via phone. Its maybe bcs the passcode on my phone. Apple also should be resolve this. Thanks for support.


AA

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5 replies

Dec 15, 2020 7:05 AM in response to amirunariffin

Some suggestions here: https://appuals.com/how-to-fix-update-error-4000-on-iphone/ of which this one is probably relevant:


  • Locked Device: It is possible that the device that you are trying to update locked with a passcode while the installation process for the software started. iPhone needs to be unlocked in order to be updated by iTunes, if it isn’t locked, this error might be triggered.


I've seen other users posting that they needed to remove their device password. It may help to simply keep your device awake and unlocked during download and the start of the installation. Perhaps set a longer auto-lock timer.


tt2

Can't update IOS via itunes

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