iOS update and restore errors
Learn how to solve iOS update and restore errors.
Try these steps first
On a Mac with macOS Catalina 10.15 or later, make sure that your Mac is up to date. If you have a Mac with macOS Mojave 10.14 or earlier, make sure you have the latest version of iTunes. If you have a PC, make sure you have the latest version of iTunes or the Apple Devices app.
If your device couldn't be restored and you get a message that "an unknown error occurred [error number]," use these steps.
If you still see the error, try the steps below.
Choose your error number or message
To learn what to do, choose your error:
Update the software on your Mac or PC
If you see error 10, your iOS device might have a newer version of iOS than is supported by your computer. You'll need to update the software on your Mac or to update iTunes or the Apple Devices app on Windows before you can update or restore your iOS device.
Disconnect and then reconnect your iOS device to your computer. You might need to unlock your iOS device before it is recognized by your Mac.
When you see a message that says a software update is required to connect to your iOS device, click Install to download and install the software so your Mac can update or restore your iOS device.
For Windows, update to latest version of iTunes or the Apple Devices app.
Make sure that your device can communicate with Apple servers
If you see error 1671, your computer is downloading necessary software. Wait for the download to finish, then try again.
If you see one of the errors below, your computer might not be able to connect to Apple servers or your iPhone, iPad, or iPod touch:
17, 1638, 3014, 3194, 3000, 3002, 3004, 3013, 3014, 3015, 3194, 3200
"There was a problem downloading the software."
"The device isn't eligible for the requested build."
Here's what to check:
If you see error 4037, your computer is unable to update your device because it's passcode locked and the device wasn't unlocked for the update or restore. Unlock your device and try again.
Learn what to do if you forgot your passcode
Cellular Update Failed or Apple Pay Not Available alert
If you see either "Cellular Update Failed" or "Apple Pay requires an Update on this iPhone" alert after an update, learn what to do.
Check your security software
If you see error 9, use these steps.
If you see errors 2, 4, 6, or 1611, check your third-party security software. Then check your USB connection.
Check your USB connections
If you see error 4005, 4013, or 4014, use these steps.
If you see one of the errors below, check your USB connection, USB cable, USB port, or computer:
13, 1600, 1601, 1602, 1603, 1604, 1611, 1643–1650
2000, 2001, 2002, 2005, 2006, 2009
An error that includes "invalid response"
Here's what to check. Try again after each step:
Use the USB cable that came with your device. If you don't have it, use another Apple-certified USB cable.
Switch to a different USB port on your computer. Don't plug into your keyboard.
Switch to a USB port on a different computer.
If you still see the error, check for other USB issues, check your third-party security software, then check your hardware.
Check your hardware
If you see error 53, use these steps.
If you see one of the errors below, you might have a hardware issue:
1, 3, 11, 12, 13, or 16
20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, or 56
1002, 1004, 1011, 1012, 1014, 1667, or 1669
Here's what to check. Try again after each step:
If iTunes is already open, quit and reopen it.
Make sure that your USB cable, computer, and network are reliable.
Try again to restore your device.
Check for outdated or modified software
If you see error 1015 or a message that "the required resource can't be found," your device might have unauthorized software modifications (jailbreaking). Or you might be trying to install an earlier version of iOS (downgrading).
To restore your device to the latest version of software, use recovery mode on your iPhone or recovery mode on your iPad.
