iPhone Could Not Be Restored (Error 4013)? 8 Fixes

You’re updating or restoring your iPhone through iTunes or Finder, the progress bar crawls along — and then the message nobody wants: “The iPhone could not be restored. An unknown error occurred (4013).” Often the phone is now stuck on the recovery screen, which makes it feel much worse than it usually is.

Error 4013 (and its siblings 9, 4005, and 4014) is Apple’s way of saying the restore conversation between your iPhone and computer broke mid-process. The break is usually mundane — an outdated computer, a flaky cable, security software butting in — and only occasionally hardware. The eight fixes below follow Apple’s own escalation path, with the data-preserving options first.

Narrow It Down First

How to Fix iPhone Error 4013

Fix 1: Update the Computer First

Apple’s official step one — an outdated Mac or iTunes fails restores in exactly this way.

1. Mac: Apple menu → System Settings → General → Software Update — install anything pending, restart, then check again (updates sometimes arrive in chains).
2. Windows: update iTunes (or the Apple Devices app) via the Microsoft Store or Apple’s installer, and run Windows Update too.
3. Reconnect the iPhone and retry.

Fix 2: Force Restart the iPhone and Retry

A frozen process on the phone’s side breaks the restore conversation — the force restart clears it even on a stuck recovery screen.

1. Press and release Volume Up, press and release Volume Down, then hold the Side button until the Apple logo (or recovery screen) appears.
2. Reconnect to the computer and attempt the update/restore again.

Fix 3: Choose “Update”, Not “Restore”

When Finder/iTunes offers both buttons, the difference matters enormously: Update reinstalls iOS while keeping your data; Restore erases everything.

1. With the iPhone connected in recovery mode, click Update first.
2. Let it download the full iOS package — on slow connections this takes a while; don’t disconnect.
3. Only if Update fails repeatedly should Restore enter the conversation — and ideally after a backup exists (see Fix 5’s note).

Fix 4: Swap the Cable and Go Direct

4013 is at heart a disconnection error — and the physical link is the most common breaker.

1. Use an original or MFi-certified cable; charging-fine-but-data-flaky cables are 4013 factories.
2. Plug directly into the computer — no USB hubs, no keyboard ports, no adapters where avoidable.
3. Try a different USB port, and clean the iPhone’s port gently (dry toothbrush/toothpick — pocket lint causes mid-transfer drops).

Fix 5: Try a Different Computer

Apple’s own escalation step — and the fastest way to split the problem in half.

1. Borrow any Mac or Windows PC with iTunes/Finder, connect, and attempt the Update.
2. Works there? Your computer was the problem (drivers, software, USB controller). Fails identically? The weight shifts toward the iPhone itself.
3. If the phone still boots normally, make a backup now before further attempts — iCloud or computer, either works.

Fix 6: Pause Security Software

Antivirus and firewall tools sometimes block the large USB data transfers a restore needs — silently.

1. Temporarily disable third-party antivirus/firewall on the computer (most have a “pause for 15 minutes” option).
2. Retry the restore, then re-enable protection afterwards.
3. On Windows, also close background “phone manager” apps that came bundled with other software — they fight iTunes for the USB connection.

Fix 7: Free Up iPhone Storage (If the Phone Still Works)

When 4013 hits during an update on a phone that otherwise works, low storage is a known trigger — the update has no room to unpack.

1. On the iPhone: Settings → General → iPhone Storage — aim for several GB free.
2. Offload unused apps and clear old videos; if storage is mysteriously full, our iPhone storage full but nothing to delete guide finds the hidden space.
3. Retry the update over the computer or directly in Settings.

Fix 8: DFU Restore — the Last Software Resort

DFU (Device Firmware Update) mode rewrites iOS at the deepest level. It erases the iPhone completely, so it comes last, after backups.

1. Connect to the computer, then: press/release Volume Up, press/release Volume Down, hold the Side button ~10 seconds until the screen goes black, then hold Side + Volume Down ~5 seconds, release Side but keep holding Volume Down until the computer detects a device in recovery — the screen stays black in true DFU.
2. Click Restore and let the process complete without touching the cable.
3. After it finishes, restore your backup during setup. If activation then acts up, our iPhone Not Activated guide covers that stage.

When It’s Hardware — the Honest Part

• The pattern that means hardware: 4013 repeating identically across multiple cables, ports, and computers — especially with a drop or water exposure in the phone’s history. At that point the usual culprits are the storage chip (NAND) or logic board connections, and no software step will fix silicon.
• Skip the “magic repair” apps. Search results for this error are crowded with paid tools promising to fix 4013 “without data loss.” For the software-side causes, the free official steps above do the same job; for hardware causes, no app can help — and some of these tools charge first and fail after. Your money is better saved for the real fix.
• Get a proper diagnosis. Apple Support or an Apple Authorized Service Provider can run diagnostics and quote the repair; out-of-warranty board-level repairs aren’t cheap, so a quote beats guessing. Independent micro-solder specialists are the budget alternative for out-of-warranty boards.
• The lesson for next time: regular iCloud or computer backups turn a 4013 crisis into a minor delay — the phone may be stuck, but your data never is.

More iPhone fixes on MozPK

• iPhone Not Activated / Could Not Activate
• iPhone storage full but nothing to delete
• Fix iPhone Unavailable without a computer
• Face ID not available after update
• iPhone Security Lockout: meaning + fix

Frequently Asked Questions

What does iPhone error 4013 mean?

The iPhone disconnected from the computer during a restore or update, or the computer couldn’t complete the process. Apple groups it with errors 9, 4005, and 4014 — all restore-communication failures with the same official fix list.

Does error 4013 mean my iPhone is dead?

Usually not. Most 4013 cases trace to outdated computer software, a flaky cable or port, or security software — all fixable in minutes. Hardware is the cause only when the error survives multiple cables, ports, and computers.

Will fixing error 4013 delete my data?

Not necessarily. Updating the computer, force-restarting, swapping cables, and choosing “Update” in recovery all preserve data. Only “Restore” and DFU mode erase the device — which is why they come last, after a backup.

Why does Apple say to try another computer?

Because it splits the diagnosis instantly: success on a second computer proves the first computer was blocking the restore; identical failure shifts suspicion to the iPhone’s hardware.

Are errors 9, 4005, and 4014 the same as 4013?

They’re the same family — the device disconnected or the restore couldn’t complete — and Apple prescribes the identical steps: update the computer, force restart, retry, new cable, new computer, then service.