Apple iPhone Error Code 27: How to Fix It

Easy 30-60 minutes Low Severity Verified June 2026
Summarize with ChatGPTSummarize with ClaudeSummarize with Perplexity Add as Preferred Source on Google
Error Code
27
Brand
Apple iPhone
Product Type
mobile
Severity
Low
DIY Difficulty
Easy
Estimated Fix Time
30-60 minutes
iPhone Error Code 27 occurs when iTunes or Finder encounters a loop error during device restore or update. This error typically happens due to outdated software, connection issues, or corrupted device firmware that prevents the restore process from completing properly.
Ad

Tools You'll Need

How to Fix Error Code 27

  1. Update iTunes or Finder

  2. Check USB cable and port

  3. Restart both devices

    Make sure to backup your iPhone data before attempting any restore operations as the process may erase your device.

  4. Try DFU mode restore

    DFU mode restore will completely erase your device. Ensure you have a recent backup before proceeding.

  5. Check security software

    Remember to re-enable your security software after completing the restore.

  6. Use recovery mode as alternative

  7. Try different computer or network

Parts You May Need

Apple-certified Lightning cable
Check Price on Amazon
Apple-certified USB-C cable
Check Price on Amazon
Apple-certified Lightning cable
Check Price on Amazon
Apple-certified USB-C cable
Check Price on Amazon
Apple-certified Lightning cable
Check Price on Amazon
Apple-certified USB-C cable
Check Price on Amazon
Apple-certified Lightning cable
Check Price on Amazon
Apple-certified USB-C cable
Check Price on Amazon
Apple-certified Lightning cable
Check Price on Amazon
Apple-certified USB-C cable
Check Price on Amazon
Apple-certified Lightning cable
Check Price on Amazon
Apple-certified USB-C cable
Check Price on Amazon
Apple-certified Lightning cable
Check Price on Amazon
Apple-certified USB-C cable
Check Price on Amazon
Apple-certified Lightning cable
Check Price on Amazon
Apple-certified USB-C cable
Check Price on Amazon
Ad

When to Call a Professional

Contact Apple Support or visit an Apple Store if the error persists after trying all troubleshooting steps, if your iPhone won't enter DFU or recovery mode, or if you suspect hardware failure. Professional help is also needed if you're uncomfortable performing DFU mode restore or if your device is still under warranty.

Frequently Asked Questions

What causes iPhone Error Code 27?
Error Code 27 is typically caused by outdated iTunes or Finder software, faulty USB connections, security software interference, or corrupted device firmware during the restore process.
Will fixing Error Code 27 erase my iPhone data?
DFU mode restore and recovery mode will erase all data on your iPhone. Always backup your device before attempting these fixes. Some troubleshooting steps like updating iTunes won't affect your data.
Can I fix iPhone Error 27 without a computer?
No, Error Code 27 specifically relates to iTunes/Finder restore processes, so you need a computer to resolve this issue. The error occurs during computer-based restore operations.
How long does it take to fix iPhone Error Code 27?
Most fixes take 30-60 minutes, including software updates and restore processes. DFU mode restore can take 15-30 minutes depending on your iPhone model and data amount.
Is iPhone Error Code 27 a hardware problem?
Error 27 is usually a software issue related to the restore process. However, if all troubleshooting steps fail, it could indicate hardware problems with the charging port, logic board, or other internal components.

Related Error Codes