iPhone error 4013: what it means and how to fix it
Error 4013 appears partway through an update or restore, when the computer suddenly cannot communicate with the iPhone. Apple's own support guidance for this family of errors starts with the connection and the cable, because that is where the failure overwhelmingly lives: the transfer between computer and phone broke down mid-process. It is frequently called a hardware error, and while a genuine hardware fault is possible, in practice a cable, a port, or a momentary disconnect is the cause far more often than a dead phone.
What causes it
- A faulty, damaged, or non-certified Lightning or USB-C cable breaking the connection mid-transfer.
- A loose or failing USB port, or a connection routed through a hub or dock.
- Security software or a computer issue interrupting communication with the device.
- In a minority of cases, a genuine hardware problem in the iPhone, which is what remains after the connection causes are eliminated.
Fix it, in order
- Update the computer software first. Install the latest macOS or Windows updates and the current version of Finder, the Apple Devices app, or iTunes. Old software mishandles new devices.
- Change the cable and the port. Use the cable that came with the iPhone or a certified one, plug directly into the computer (never a hub), and try a different port. This single step fixes most 4013s.
- Force restart the iPhone and retry the update. A force restart clears the phone's stalled state without erasing anything. Then attempt the update again before resorting to a restore.
- Temporarily disable security software on the computer if the error repeats, since antivirus tools can interrupt the device connection, and test again.
- Try another computer if you have access to one. Success there proves the phone is fine and the first computer is the problem.
- Restore via recovery mode only if the update path keeps failing, and only with a backup in place. If error 4013 survives a restore attempt on a second computer with a known-good cable, the phone likely has a hardware fault and needs Apple service.
A restore erases the device. Updating keeps your data; restoring wipes the iPhone and installs a clean system, after which you set it up from a backup. Make sure a recent iCloud or computer backup exists before any step below that says restore, and treat restore as the last resort it is.
Common questions
Is error 4013 a hardware failure? It can be, but it usually is not. Apple groups 4013 with errors that occur when the device disconnects during an update or restore, and the commonest disconnects are cables and ports. Hardware becomes the likely answer only after a known-good cable, a direct port, and ideally a second computer all produce the same error.
What is the difference between error 4013 and 4014? They are siblings in the same family: both mean the update or restore process lost proper contact with the device, and Apple documents them together with the same advice. The fixes are interchangeable in practice.
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