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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.

 


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Comments

Meanie02 on Wednesday, 11 November 2020 09:33

I disabled my passcode and it worked just fine!

I disabled my passcode and it worked just fine!
ROY on Wednesday, 21 October 2020 13:42

The error seems to stem from Itunes. Of course if you use your phone to perform the upgrade over WiFi, it will skip Computer / Itunes, the upgrade will be successful. Why does Itunes cause this?

The Passcode is not the fix, as my screen does not become locked, and I still get the error message. I even tried another computer (instead of work computer) and same error.

Any help this post was 3 years ago, it's no longer relevant. We need a new blog for IOS 14 and the year 2020.

Malarky Balarky. Nothing to see here.

The error seems to stem from Itunes. Of course if you use your phone to perform the upgrade over WiFi, it will skip Computer / Itunes, the upgrade will be successful. Why does Itunes cause this? The Passcode is not the fix, as my screen does not become locked, and I still get the error message. I even tried another computer (instead of work computer) and same error. Any help this post was 3 years ago, it's no longer relevant. We need a new blog for IOS 14 and the year 2020. Malarky Balarky. Nothing to see here.
can on Wednesday, 21 October 2020 12:16

i just turned off pass-code and tried to update again. It worked!

i just turned off pass-code and tried to update again. It worked! :D
Huy Nguyen on Saturday, 07 November 2020 10:33

That's right. It worked

That's right. It worked
Buzzdy on Friday, 23 October 2020 23:35

Turned off pass code and it worked for me.

Turned off pass code and it worked for me.
Andrew on Thursday, 08 October 2020 19:11

Tried updating 2 different phone models (8+ and 11 Pro Max) using latest iTunes (12.10.9.3) and USB cable as I have done for the past 5 years (with these phones and previous models). Both phones failed to update from iOS 13.7 to 14.0.1 using a cable. Tried 2 different cables. Kept phones awake and unlocked. iTunes is latest version. Later, I tried updating the 8+ over WiFi and it succeeded. Ridiculous that error 4000 is not described on any of Apple's websites. Steve would be turning in his grave.

Tried updating 2 different phone models (8+ and 11 Pro Max) using latest iTunes (12.10.9.3) and USB cable as I have done for the past 5 years (with these phones and previous models). Both phones failed to update from iOS 13.7 to 14.0.1 using a cable. Tried 2 different cables. Kept phones awake and unlocked. iTunes is latest version. Later, I tried updating the 8+ over WiFi and it succeeded. Ridiculous that error 4000 is not described on any of Apple's websites. Steve would be turning in his grave.
Dio on Tuesday, 13 October 2020 22:42

i cant update over wifi so im stuck on 13.5

i cant update over wifi so im stuck on 13.5
Michael Keays on Sunday, 04 October 2020 15:30

Well, I have another slant on this. Tried to upgrade to 14.0.1 via iTunes and got the 4000 error twice in succession. So I decided to upgrade directly via the iphone, and it worked fine. However, I don't think that was the cause of the issue; more, I think it was that my phone was at less than 50% battery when I tried and failed (and plugging the phone into the computer clearly doesn't draw enough power) ... and when I did update, I was plugged into a proper charger and the phone was quite happy with that. So, check your power / battery level first - may be as simple as that!

Well, I have another slant on this. Tried to upgrade to 14.0.1 via iTunes and got the 4000 error twice in succession. So I decided to upgrade directly via the iphone, and it worked fine. However, I don't think that was the cause of the issue; more, I think it was that my phone was at less than 50% battery when I tried and failed (and plugging the phone into the computer clearly doesn't draw enough power) ... and when I did update, I was plugged into a proper charger and the phone was quite happy with that. So, check your power / battery level first - may be as simple as that!
sam john on Monday, 25 May 2020 05:24


This error is coming just because of your phone being is disconnected or getting locked, the better solution is check your cable which you used to connect apple phone is working properly or not, if its working then keep your phone connected and make sure your phone is unlocked mode, please note your phone will auto lock after 30 sec or after one min so make sure u keep unlocked your phone bye touching the phone screen in between or u can play a YouTube video to prevent your phone from auto lock.
if this both is not working then try to update your phone using your phone itself. For that you have to clear your phone memory if you don't have enough memory minimum free space is 6GB or more. Hope this will work if not let me know.

This error is coming just because of your phone being is disconnected or getting locked, the better solution is check your cable which you used to connect apple phone is working properly or not, if its working then keep your phone connected and make sure your phone is unlocked mode, please note your phone will auto lock after 30 sec or after one min so make sure u keep unlocked your phone bye touching the phone screen in between or u can play a YouTube video to prevent your phone from auto lock. if this both is not working then try to update your phone using your phone itself. For that you have to clear your phone memory if you don't have enough memory minimum free space is 6GB or more. Hope this will work if not let me know.
Myra on Wednesday, 08 April 2020 17:42

I need ios13, updating via usb on pc. error 4000 continues to come up. how do i fix this

I need ios13, updating via usb on pc. error 4000 continues to come up. how do i fix this
cathy on Monday, 23 September 2019 12:38

i have tried this iphone 6 which i havent used for at least 1,5 years. went to the apple store and they said they cant fix it - left it off for too long. do you think i can sell it like it is as spare parts?

i have tried this iphone 6 which i havent used for at least 1,5 years. went to the apple store and they said they cant fix it - left it off for too long. do you think i can sell it like it is as spare parts?
Noone on Monday, 22 July 2019 16:20

when you spend more time trying to execute an update............ there is something really wrong with that picture.

when you spend more time trying to execute an update............ there is something really wrong with that picture.
m c asthana on Sunday, 06 January 2019 01:11

unable to reset passcode from phone

unable to reset passcode from phone
m c asthana on Sunday, 06 January 2019 01:10

i have iphone 8 plus. unable to update on phone as apple id password not being accepted. same accepted on my pc

i have iphone 8 plus. unable to update on phone as apple id password not being accepted. same accepted on my pc
Hiro on Sunday, 16 December 2018 21:47

How can I update my iPad that passcode still using but no chance to enter the system (that means when I press power button, it's always showing recovery mode) :'( ?

How can I update my iPad that passcode still using but no chance to enter the system (that means when I press power button, it's always showing recovery mode) :'( ?
Rhonda James on Friday, 23 November 2018 01:06

exactly what the problem was. passcode

exactly what the problem was. passcode
joohn on Wednesday, 12 September 2018 10:43

im still getting 4000 error even after i put in the passcode

im still getting 4000 error even after i put in the passcode
James Rivington on Monday, 23 July 2018 12:41

Thank you! Thank you! Thank you! Yes to all the comments above about the software "kiddies". Very polite compared to what I might say.

Thank you! Thank you! Thank you! Yes to all the comments above about the software "kiddies". Very polite compared to what I might say.
Ted Heubach on Tuesday, 05 June 2018 11:51

"It is also possible your iOS device locked with a passcode.." - That was the reason !

"It is also possible your iOS device locked with a passcode.." - That was the reason !
Chin Music on Wednesday, 03 October 2018 18:59

Thank you, thank you, the passcode lock, (Settings: Display and Brightness) was turned on to 5 minutes. When I changed it to "Never" my update went through.

Thank you, thank you, the passcode lock, (Settings: Display and Brightness) was turned on to 5 minutes. When I changed it to "Never" my update went through.
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Friday, 27 November 2020

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