iPhone Error 4013 and Error 4041 Data Recovery

What Happens When Apple's Steps Do Not Clear Error 4013?

Apple's steps change the variables outside the phone: the computer, the cable, the port, the software version. Once you have changed every one of those and the same code lands, you have eliminated the outside of the phone. The remaining variable is the board, and no restore attempt reaches it. At that point, running the restore again won't tell you anything new. It's only risk.

It also matters if liquid was ever involved, because corrosion keeps spreading while a phone sits on a desk between attempts. The water damage path covers what that does to a board, and the storage-chip path covers the boards that never enumerate at all.

What Are Error 4041 and Error 4042?

Apple documents neither code. Both are absent from Apple's update and restore error index, so unlike 4013 there is no published cause, no published step list, and nothing to quote. A phone that keeps failing a restore is diagnosed by measurement on the bench instead.

Stop troubleshooting when the checks stop changing the outcome. If you've tried a current computer, a different Apple-certified cable, and a different machine, and you still get the same 4041 or 4042, more restore attempts aren't going to change it. What is left is a measurement on the board, not a setting on your computer.

Send it in sooner if liquid was involved, or if the phone stops powering on at all between attempts, because corrosion keeps spreading while it sits. Evaluation is free, and if we can't get the data off, you don't pay.

Board-level work on a Face ID model runs $750 whichever code brought it in, and all of it happens in-house at the Austin, TX lab alongside the rest of our board-level iPhone data recovery work.

Does Finishing the Restore Erase the Data on Your iPhone?

Yes. Apple's own instruction for these codes is to click Update, which it describes as reinstalling the software and keeping your personal data. Restore is the other button, and the difference is your data: Restore reinstalls iOS and erases all of it.

Recovery mode by itself takes nothing off the phone. It is a prompt with two buttons, and the button you press decides the outcome.

Update

Reinstalls the software. Your personal data stays.

Restore

Reinstalls iOS. All your data is erased.

Apple's cable, port, and computer checks exist to separate a computer problem from a phone problem. They aren't a technique for forcing a restore through.

The error code won't tell you what state the phone is in after a failed restore. We find that out by measuring the board and checking what's still on the phone. Running the restore again from the same computer won't tell you either.

Error 4013 Does Not Mean Your Data Is Gone

A 4013 is a restore that did not finish, not a sign your data was erased or is floating around freely readable.

On A7-and-later iPhones (iPhone 5s onward, which covers every FaceID model), the storage is protected by hardware Data Protection. Decryption needs three originals together: the paired NAND, the original SoC with its Secure Enclave, & the owner's passcode. Those pieces have to work as a set on the original hardware.

That's why pulling the memory chip off the board does nothing on these devices. A removed NAND yields only ciphertext, because it is cryptographically paired to its own SoC; a blank or foreign NAND swapped onto the board can't be decrypted either.

The recovery path is to repair the original board so the phone powers on, then let you enter your passcode so it decrypts its own data in place. We never work around the passcode or the Secure Enclave, & we don't need to.