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Fix: iPhone Could Not Be Updated Error 4000 – iTunes

iPhone Could Not Be Updated Error 4000 iTunes

If you are trying to update your iOS device (iPhone or iPad) using iTunes, you may receive an error message after the iOS update downloads and attempts to install to your device.

 

The iPhone “” could not be updated. An unknown error occurred (4000).

 

The error most likely indicates your iPhone is already updated with the version of iOS iTunes downloaded. Verify this on your iPhone and attempt the updated using your iPhone by going to Settings -> General -> Software Update.

 

It is also possible your iOS device locked with a passcode during the beginning of the installation in iTunes and this caused the update to fail.





If you still want to update your iOS using iTunes, ensure you are using the latest version of iTunes from Apple. Reboot your iOS device and attempt the update through iTunes again by plugging your iOS device into your computer.

 


* Please use the comment form below to let us know if you experience issues, have questions, or can provide solution. We want and encourage feedback. *



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Comments

yeppyyappy on Sunday, 03 December 2017 08:03

Thank you for your information for my IPhone to work properly. It is so much better then going to Apple because your information is more direct & easy, no unnecessary wording.

Thank you for your information for my IPhone to work properly. It is so much better then going to Apple because your information is more direct & easy, no unnecessary wording.
Bob on Wednesday, 20 December 2017 17:18

Error 4000 was being caused by the passcode because I was leaving the phone updating and kept missing the message requesting the passcode be entered on the phone. Stupid Apple. Stupid iPhone. Stupid iTunes. Buy any phone that isn’t from Apple. You know I’m right.

Error 4000 was being caused by the passcode because I was leaving the phone updating and kept missing the message requesting the passcode be entered on the phone. Stupid Apple. Stupid iPhone. Stupid iTunes. Buy any phone that isn’t from Apple. You know I’m right.
Recardo Mims on Saturday, 23 December 2017 00:50

Thank You It was because of the passcode!

Thank You It was because of the passcode!
meep on Tuesday, 20 February 2018 18:00

Yes!!! It was the passcode! Grrr..

Yes!!! It was the passcode! Grrr..
KayDee on Friday, 09 March 2018 23:44

bloody passcode. How is that an unknown error?

bloody passcode. How is that an unknown error?
MW on Monday, 16 April 2018 11:08

Rebooting my phone seemed to resolve my issue.

Rebooting my phone seemed to resolve my issue.
weezely on Tuesday, 08 May 2018 12:03

[gripes start]

Since there are plenty of us complaining - here's my list of gripes.

* Yes - Idiotic that it throws an uknown error 4000 when it should know damn well a passcode stopped it.. (Agree 100% with above commenters).

* Why couldn't Apple have got the silly iPhone / silly iTunes to prompt for passcode right at the START - before I went off to have a shower or do something else.. No it needs its silly little hand held...

* Here's the kicker - Today getting off the train with 10% battery left, iOS decides to prompt me to update to the latest version.. Great idea!@! Let's see how that goes!! NOT.

For big companies MS, Apple and others do a great job of looking like they need to hire some kindergartners to give them some clues on decent software engineering...

[gripes end]

[gripes start] Since there are plenty of us complaining - here's my list of gripes. * Yes - Idiotic that it throws an uknown error 4000 when it should know damn well a passcode stopped it.. (Agree 100% with above commenters). * Why couldn't Apple have got the silly iPhone / silly iTunes to prompt for passcode right at the START - before I went off to have a shower or do something else.. No it needs its silly little hand held... * Here's the kicker - Today getting off the train with 10% battery left, iOS decides to prompt me to update to the latest version.. Great idea!@! Let's see how that goes!! NOT. For big companies MS, Apple and others do a great job of looking like they need to hire some kindergartners to give them some clues on decent software engineering... [gripes end]
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Sunday, 20 May 2018

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