How to Fix iTunes Error 1667 When Restoring iPhone

By ErrorFix · Updated October 23, 2026 · 8 min read

What error 1667 means

Error 1667 shows up in iTunes on Windows or Finder on a Mac while you are restoring an iPhone. The dialog says the iPhone could not be restored and that an unknown error occurred (1667), and the restore stalls or rolls back instead of continuing. Your data situation depends on how far the restore got, so treat the phone as if it still needs a working backup before you try again.

The code's meaning is refreshingly direct. Error 1667 is iTunes' way of saying the restore stream between the computer and the phone was cut off — most often the phone was disconnected, or its cable lost contact, while iTunes was showing the confirmation dialog that it would erase and restore the iPhone and verify the restore with Apple. Apple groups 1667 with the restore codes that can indicate a possible hardware issue, which means the connection angle should be ruled out first, and a service appointment comes second.

The good news is that most cases are fixed at your desk. Firmly replug the cable, use a genuine Apple cable in a direct USB port, restart both devices, update iTunes, and leave the phone completely alone during the restore — and error 1667 usually disappears at one of those steps.

Common causes

• Phone unplugged or cable glitched mid-restore: the classic trigger — the phone is disconnected during the erase-and-restore confirmation dialog, or the cable loses contact and the restore stream stops.
• Worn or uncertified cable: a damaged or non-certified cable can charge fine but drop data mid-restore.
• USB hubs, docks, or weak ports: anything between the phone and the computer, or a worn port, can interrupt the restore stream.
• Outdated or incomplete iTunes: old iTunes builds mishandle the restore handshake and abort with 1667.
• Security software interference: antivirus or firewall tools interrupt the traffic between the computer and the phone during the restore.

How to fix error 1667 — step by step

Follow these in order. Error 1667 is a connection failure at heart, so the first steps — securing the cable and restarting both devices — clear most cases before you ever touch software settings. The later steps clean up the computer side, and the different-computer test at the end tells you whether hardware service is needed.

1. Reconnect everything and restart both devices. Error 1667 most often means the connection between the iPhone and the computer dropped while the restore was running, so the first fix is making that connection solid. Unplug the cable from the phone, the computer, or both, then plug it back in and listen for the chime or connection sound. Restart the iPhone — on iPhone 8 and later, press and quickly release Volume Up, press and quickly release Volume Down, then press and hold the Side button until the Apple logo appears. Restart the computer as well, then disconnect every other USB device, hub, display, or spare cable from the computer except the keyboard, mouse, and the iPhone. Once both are back up, try the restore again without touching the cable.
2. Use an original Apple cable plugged directly into the computer. Third-party cables and anything between the phone and the computer are the second most common cause of error 1667. Switch to a genuine Apple Lightning or USB-C cable, or at least a certified MFi cable, and inspect it for frays, bent pins, or loose connections at either end — USB cables wear out from the inside and can look fine while dropping data. Plug the cable directly into a USB port on the computer itself, not a keyboard pass-through, monitor hub, dock, or external hub, which deliver less power and weaker communication. Try a different port on the computer too, because worn port contacts can drop the restore stream midway.
3. Update iTunes, the Apple apps, and the computer's software. Error 1667 often appears when iTunes or the Apple support software on the computer is old or installed incorrectly. In classic iTunes on Windows, click Help at the top of the window and choose Check for Updates, and install anything it finds. If you use Apple's modern apps, open the Microsoft Store, go to Library, and update Apple Music, Apple Devices, and Apple TV. On a Mac, iPhone restores run through Finder, so open System Settings, General, Software Update, and install pending macOS updates. Restart the computer after updating, then reconnect the iPhone and run the restore again.
4. Temporarily disable security software. Antivirus and firewall software can interrupt the low-level traffic between the computer and the iPhone during a restore, which shows up as error 1667. On Windows, open Windows Security, go to Virus and threat protection, and pause real-time protection for the duration of the restore, then check Firewall and network protection to make sure Apple Mobile Device Service and iTunes are allowed through. If you run a third-party suite, temporarily turn off its active shields and web protection. Try the restore again while the shields are down, and turn everything back on as soon as it finishes.
5. Restore through recovery mode instead of a standard restore. If the restore keeps failing from a normal state, put the iPhone into recovery mode and restore from there — this bypasses whatever state the phone is stuck in. Connect the iPhone to the computer, then on iPhone 8 and later press and quickly release Volume Up, press and quickly release Volume Down, then press and hold the Side button until you see the cable-and-computer recovery screen. On iPhone 7 or 7 Plus, hold the Side button and Volume Down together until the recovery screen appears; on iPhone 6s and earlier, hold Home and Sleep together. On the computer, choose Update first if offered, because it tries to reinstall iOS without wiping your data; if Update fails or is not offered, choose Restore, which erases the phone and installs a fresh iOS copy.
6. Try a different computer — and consider service if 1667 persists. Apple groups error 1667 with the restore errors that point to a possible hardware issue, so if it survives a solid cable, direct port, updated software, and recovery mode, the problem may be in the phone or computer hardware. Try the restore on a different known-good computer with current iTunes or Finder and a good cable — if it completes there, your original computer's USB controller or iTunes installation is the culprit. If 1667 fails on two computers, inspect the iPhone's charging port for lint or damage, and book an Apple Store or authorized service appointment, telling them the restore repeatedly fails with error 1667 so they can check the port, the cable path, and the phone's restore hardware.

Did this fix it? Quick checklist

• Cable firmly connected, genuine Apple or certified, direct USB port, nothing else on the USB chain
• iPhone and computer restarted; iTunes, Finder, and macOS/Windows fully updated
• Antivirus and firewall temporarily disabled; phone left undisturbed during the restore
• Restore completes from recovery mode without error 1667 — phone activates and sets up normally

If error 1667 survives a firm cable connection, updated software, disabled security tools, recovery mode, and a second computer, the phone's charging port or restore hardware is the likely culprit. Book an Apple Store or authorized service appointment and mention error 1667 so they can check the hardware path.