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How to fix iTunes could not connect to this iPhone (or iPad) because an unknown error occurred (0xE8000015)

What is iTunes error 0xe8000015? What are the causes and how to fix it?

The unknown error occurred (0xe8000015) popup appears when you connect your iPhone, or iPad to the computer via the lightning cable, but your device isn't recognized by the computer, and successful communication cannot be established between them.

The most common causes for this error are:

  • The lighthing cable;
  • The USB or the lightning port;
  • Malicious software;
  • Antivirus and Firewall settings;
  • Corrupt iTunes files.

Read along and test our step-by-step and proven-to-work solutions to fix this iTunes error message. Make sure to follow the solutions carefully.

Select specifications which apply:

Click on this if you use an iPhone.

Click on this if you use an iPad.

Click on this if you tried all the other options but none of them worked.

  1. Make sure that you have the latest version of iTunes

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  2. Ensure that your iOS device trusts your computer

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  3. Restart your iOS device

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  4. Make sure that your device is turned on

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  5. Ensure that your computer's antivirus software doesn't block your iOS device

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  6. Plug in your device in another USB port of the computer

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  7. Replace the USB (lightning) cable

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  8. Clean the device's and computer's USB port

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  9. Connect your device to another computer

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  10. Contact Apple's support team

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  11. Take your iOS device to a repair shop

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  12. Reinstall iTunes

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  13. Put your device into DFU mode and restore it via iTunes

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  14. Update your iOS device's operating system to the latest version

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  15. Update the computer's operating system to the latest version

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  16. Free up storage on your iOS device

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  17. Delete the "Lockdown" folder

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