iPhone Error Code 27: How to Fix It
Medium 30-60 minutes Medium Severity
Verified June 2026
- Error Code
- Error 27
- Brand
- iPhone
- Product Type
- mobile
- Severity
- Medium
- DIY Difficulty
- Medium
- Estimated Fix Time
- 30-60 minutes
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Tools You'll Need
- Computer with iTunes or Finder
- Apple-certified USB cable
- Stable internet connection
How to Fix Error Code Error 27
-
Update iTunes to Latest Version
Back up your iPhone data before proceeding with any restore operations -
Check USB Connection and Cable
-
Restart Both Devices
-
Disable Security Software Temporarily
Only disable security software temporarily and re-enable immediately after completing the restore -
Try Recovery Mode Restore
-
Use DFU Mode if Recovery Mode Fails
DFU mode will completely erase your device - ensure you have a recent backup -
Try Different Computer or 3uTools
Parts You May Need
Apple-certified Lightning or USB-C cable
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Apple-certified Lightning or USB-C cable
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Apple-certified Lightning or USB-C cable
Check Price on Amazon
Apple-certified Lightning or USB-C cable
Check Price on Amazon
Apple-certified Lightning or USB-C cable
Check Price on Amazon
Apple-certified Lightning or USB-C cable
Check Price on Amazon
Apple-certified Lightning or USB-C cable
Check Price on Amazon
Apple-certified Lightning or USB-C cable
Check Price on Amazon
Apple-certified Lightning or USB-C cable
Check Price on Amazon
Apple-certified Lightning or USB-C cable
Check Price on Amazon
Apple-certified Lightning or USB-C cable
Check Price on Amazon
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When to Call a Professional
Contact Apple Support or visit an Apple Store if the error persists after trying all steps, if your iPhone won't enter recovery/DFU mode, or if you're uncomfortable performing firmware restores. Professional help is also recommended if your device is still under warranty.Frequently Asked Questions
What causes iPhone Error 27 during iTunes restore?
Error 27 is typically caused by outdated iTunes software, faulty USB connections, security software interference, or corrupted device firmware that prevents proper communication between your iPhone and iTunes.
Will fixing Error 27 erase my iPhone data?
Most fixes won't erase data, but recovery mode and DFU mode restores will completely wipe your device. Always ensure you have a recent backup before attempting these solutions.
Can I fix iTunes Error 27 without a computer?
No, Error 27 specifically relates to iTunes/computer connectivity issues during restore processes. You need a computer with iTunes or Finder to resolve this error.
How do I prevent iPhone Error 27 from happening again?
Keep iTunes updated, use quality Apple-certified cables, maintain stable internet connections during updates, and regularly back up your device to avoid data loss if restore issues occur.
Is iPhone Error 27 the same as iTunes Error 27?
Yes, iPhone Error 27 and iTunes Error 27 refer to the same issue - a communication problem between your iPhone and iTunes during software restore or update processes.