Apple iPhone Error Code 31: How to Fix It

Easy 15-30 minutes Medium Severity Verified June 2026
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Error Code
31
Brand
Apple iPhone
Product Type
mobile
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
15-30 minutes
Apple iPhone Error Code 31 appears in iTunes when the device is stuck in DFU (Device Firmware Update) mode and fails to restore or update. This usually means communication between your iPhone and computer is disrupted, often due to a faulty USB connection, outdated iTunes, or a corrupted firmware file.
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Tools You'll Need

How to Fix Error Code 31

  1. Force Restart Your iPhone

  2. Update iTunes to the Latest Version

  3. Try a Different USB Cable and Port

  4. Disable Security Software Temporarily

    Re-enable security software after fixing the error.

  5. Use Recovery Mode Instead of DFU

    Restore will erase all data; ensure you have a backup.

  6. Check for Corrupted Hosts File (Windows)

    Back up the original hosts file first.
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When to Call a Professional

If the error persists after trying all steps, or if your iPhone is stuck in DFU mode without a restore option, contact Apple Support or visit an Apple Store for hardware diagnostics.

Frequently Asked Questions

What is DFU mode on iPhone?
DFU (Device Firmware Update) mode is a deeper restore state that allows your iPhone to communicate with iTunes without loading the operating system. It is used to fix major software issues.
Will error 31 erase my data?
The error itself doesn't erase data, but the restore process required to fix it will erase all content. Always back up your iPhone before attempting a restore.
Can error 31 be caused by a faulty cable?
Yes, a damaged or non-certified cable can interrupt communication between iPhone and iTunes, causing error 31. Always use an Apple-certified cable.
How do I exit DFU mode without restoring?
Force restart: press and quickly release Volume Up, then Volume Down, then press and hold the Side button until the Apple logo appears.
Does error 31 occur on all iPhone models?
Yes, error 31 can occur on any iPhone model when using iTunes to update or restore while the device is in DFU mode.

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