iOS14 Error 4000
I am trying to update my phone via iTunes to ios14 and I keep getting this unknown error (4000)
currently on 13.6.1 iphone 11 pro
iPhone 11 Pro
Remove password for while it will work
Question marked as
Error 4000 is an undocumented error code (at least publicly undocumented). It means that the connection between the phone and iTunes was interrupted in the middle of a sync or update activity. In the past this might have been caused by a flakey USB port, an antivirus or a firewall. However, there is a new cause of this error that is the result of a bug in iTunes for Windows that requires the phone not be locked during the update. So first check your antivirus and firewall (temporarily disable them), but if that doesn’t fix it there are three workarounds for the bug:
- Update over the air, by going to Settings/General/Software Update
- Downgrade iTunes to version 12.8 if you can find a copy - try https://apple.com/itunes
- Temporarily disable the screen lock passcode on the phone before updating using iTunes on Windows
Note that this error should only be a problem for updates; if you are restoring iOS rather than updating it should not occur.
66 replies
Settings / Touch ID & Passcode / Turn Passcode Off
When updating OTA, the update would fail. However, after removing the password, the update would proceed as one would expect.
No error number is shown on the iPhone screen, just a message saying “the update has failed” or something similar
The solution has been posted many times in the thread you posted to. Just go back and read the other posts.
Having the same issue now when updating to 14.1.
Bit frustrating this isn't solved yet.
Although removing / adding passcode isn't that much work, having to remove all Apple Pay cards and reinstall them is very annoying
Thanks for this. That worked. (Of course, updating over the air also works, but it was really bugging me that I couldn't do it via iTunes.)
I hope Apple squishes this irritating bug soon. I've submitted feedback.
Jenpineapple1 wrote:
Nope. Removing password did not work. I have an appointment to go I. Store to the Genius Bar on Saturday.
After your Genius Bar meeting, would you be so kind to post here the solution, if different from the ones we already suggested?
Thanks and regards
Giulio
Kilgore87 wrote:
Hopefully all of you who have connections can get a positive result.
I've seen this update fail while updating OTA too, so I’d be surprised if Apple’s team weren’t aware
Just curious: did you see that error while updating OTA, or did you read about it?
Thanks
Giulio
Then out of 500 million users, your phone appears to be an exception. Because I have not seen any other posts claiming that the update can only be installed if you remove the passcode. And none of my 4 iOS devices had any problem updating - with the passcodes fully active.
Is that why you’re on a forum that’s specifically discussing installation problems for iOS 14? If no one else was having a problem then I guess this page wouldn’t exist
https://www.howtoisolve.com/software-update-failed-ios-11-on-iphone-ipad/
If you’re not having problems with any of your phones then I’d say you’re fine and there’s more interesting websites to look at. Enjoy your day
It works. Thanx!
This worked for me too, thanks heaps
It worked!
I thank you a lot for this question and its reply, The removal of passcode really helped in the errors..., Thanks for helping and thanks to alll...
Awesome! It worked for me too!
iOS14 Error 4000