Apple iPhone Error Code 37: How to Fix It

Medium 30-90 minutes Medium Severity Verified June 2026
Summarize with ChatGPTSummarize with ClaudeSummarize with Perplexity Add as Preferred Source on Google
Error Code
37
Brand
Apple iPhone
Product Type
mobile
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-90 minutes
iPhone Error Code 37, also known as iTunes Error 37, occurs when your device has firmware compatibility issues, often when the wrong device firmware has been loaded or there's a mismatch between your device and iTunes. This error typically appears during restore or update processes and can prevent your iPhone from functioning properly.
Ad

Tools You'll Need

How to Fix Error Code 37

  1. Close iTunes and disconnect your iPhone

    Always safely eject your iPhone before disconnecting to prevent data corruption

  2. Force restart your iPhone

  3. Update iTunes to the latest version

  4. Use a different USB cable and port

    Use only certified Lightning cables to prevent communication errors

  5. Put iPhone in Recovery Mode

  6. Restore iPhone through iTunes

    This will erase all data on your iPhone - ensure you have a recent backup

  7. Try DFU mode if recovery mode fails

    DFU mode is more aggressive and will completely erase your device

  8. Contact Apple Support if error persists

Parts You May Need

Original Apple Lightning cable
Check Price on Amazon
Original Apple Lightning cable
Check Price on Amazon
Original Apple Lightning cable
Check Price on Amazon
Original Apple Lightning cable
Check Price on Amazon
Original Apple Lightning cable
Check Price on Amazon
Original Apple Lightning cable
Check Price on Amazon
Original Apple Lightning cable
Check Price on Amazon
Original Apple Lightning cable
Check Price on Amazon
Ad

When to Call a Professional

Contact Apple Support or visit an authorized repair center if the error persists after trying all troubleshooting steps, if your iPhone won't enter recovery or DFU mode, or if you're uncomfortable performing firmware restoration procedures that will erase your device.

Frequently Asked Questions

What causes iPhone Error 37?
iPhone Error 37 is typically caused by firmware compatibility issues, corrupted firmware installation, or when the wrong device firmware has been loaded onto your iPhone during a restore or update process.
Will fixing Error 37 erase my iPhone data?
Yes, resolving Error 37 usually requires restoring your iPhone through iTunes, which will erase all data on your device. Make sure you have a recent backup before attempting the fix.
Can I fix iPhone Error 37 without iTunes?
No, Error 37 is specifically an iTunes-related firmware error that requires iTunes or Finder (on macOS Catalina and later) to properly restore the correct firmware to your device.
How long does it take to fix iPhone Error 37?
The fix process typically takes 30-90 minutes, depending on your internet speed for downloading firmware and the time needed for the restoration process to complete.
Is iPhone Error 37 a hardware or software problem?
Error 37 is primarily a software/firmware issue, but if it persists after trying all troubleshooting steps, it could indicate a hardware problem with the device's firmware chip or logic board.

Related Error Codes