Back to All Errors
USB Connection Issues Medium Severity
Error 1646: USB Connection Issue
This error indicates a problem with the USB connection between your device and computer during the restore process.
Before You Begin
- • On Mac with macOS Catalina 10.15 or later: Ensure your Mac is up to date
- • On Mac with macOS Mojave 10.14 or earlier: Ensure you have the latest version of iTunes
- • On PC: Ensure you have the latest version of iTunes or the Apple Devices app
Common Causes
- 1 Faulty or non-certified USB cable
- 2 USB port issues on computer
- 3 Loose connection
- 4 Interference from other USB devices
How to Fix Error 1646
1
Use Original USB Cable
Use the USB cable that came with your device. If you don't have it, use another Apple-certified USB cable.
2
Try Different USB Port
Switch to a different USB port on your computer. Don't plug into your keyboard.
3
Try Different Computer
Switch to a USB port on a different computer.
4
Check for Other Issues
If error persists, check for other USB issues, check your third-party security software, then check your hardware.
Related Articles
Related Errors
Other USB Connection Issues
Still Need Help?
If you've tried all the steps above and still can't resolve the issue, you may need to contact Apple Support or visit an Apple Store. You can also compare your case against Apple's official iOS update and restore errors page.