Apple iOS Error Code 0x26100000: How to Fix It

Hard 30–90 minutes (software attempts); longer if professional repair is needed High Severity Verified June 2026
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Error Code
0x26100000
Brand
Apple
Product Type
operating_system
Severity
High
DIY Difficulty
Hard
Estimated Fix Time
30–90 minutes (software attempts); longer if professional repair is needed
Error code 0x26100000 is a NAND flash memory restore error that appears in iTunes or Finder when attempting to restore or update an Apple device such as an iPhone or iPad. It typically means the device's internal NAND storage chip has encountered a critical fault, is failing, or could not be properly written to during the restore process. This is a high-severity error that can render your device unusable if not addressed correctly, and in some cases it indicates a hardware failure that requires professional repair.
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Tools You'll Need

How to Fix Error Code 0x26100000

  1. Back Up Any Accessible Data Immediately

    Do not skip this step if your device is still partially functional. A failed NAND can degrade further during any restore attempt, and you may lose all data permanently.

  2. Update iTunes or Finder on Your Computer

  3. Try a Different USB Cable and Port

  4. Force the Device into DFU Mode

    Entering DFU mode and completing a restore will erase all data on the device. Only proceed if you have a backup or are prepared to lose device data.

  5. Attempt a Full Restore via Finder or iTunes

    Ensure your computer does not go to sleep or lose power during the restore. A partial write to NAND storage can make the issue worse.

  6. Try a Different Computer

  7. Temporarily Disable Security Software

    Only disable security software briefly and in a trusted network environment. Re-enable it as soon as the restore process finishes.

  8. Check Apple's System Status Page

  9. Contact Apple Support or Visit an Apple Store

    Do not attempt to open your device or replace the NAND chip yourself. NAND storage on Apple devices is paired to the logic board and replacing it requires specialized equipment and software. Unauthorized repairs can permanently disable Touch ID, Face ID, and other security features.

Parts You May Need

NAND flash storage chip
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Apple-certified Lightning or USB-C cable
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NAND flash storage chip
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Apple-certified Lightning or USB-C cable
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When to Call a Professional

If you have completed all software-based steps — including DFU restore on multiple computers — and error 0x26100000 still appears, the NAND flash storage chip on your device's logic board has most likely failed at a hardware level. At this point, take your device to an Apple Store Genius Bar, an Apple Authorized Service Provider, or a reputable third-party iPhone repair shop that specializes in microsoldering and board-level repair. NAND failure often means the device cannot be restored without specialized hardware tools and is frequently covered under AppleCare+ if you have it. Do not delay, as a failing NAND chip can become completely unreadable over time, making professional recovery even more difficult.

Frequently Asked Questions

What does Apple error code 0x26100000 mean?
Error code 0x26100000 is a NAND restore error, meaning that iTunes or Finder was unable to write the new firmware to your device's internal NAND flash storage chip during a restore. This can be caused by corrupted firmware, a failed restore process, or — most seriously — a physically damaged or failing NAND chip inside the device.
Can I fix error 0x26100000 without losing my data?
Unfortunately, resolving this error almost always requires a full device restore, which erases all data. If your device is still partially functional, try to create a backup via iTunes or Finder before attempting any fix. If the device is already stuck in recovery or DFU mode, data recovery may not be possible without professional data recovery services.
Is error 0x26100000 always a hardware failure?
Not always. While this error frequently points to a NAND hardware issue, it can sometimes be triggered by a bad USB cable, an outdated version of iTunes, interference from security software, or Apple server problems. Always try the software-based steps — updating iTunes, using DFU mode, trying a different computer and cable — before concluding it is a hardware failure.
How much does it cost to repair a NAND failure on an iPhone?
Repair costs vary widely. If your device is covered by AppleCare+, Apple may repair or replace it for a reduced service fee. Out-of-warranty repairs at the Apple Store can range from $150 to $500 or more depending on the model. Third-party board-level repair shops that specialize in NAND replacement or reballing may offer more affordable options, typically ranging from $100 to $300, but results are not guaranteed.
Does error 0x26100000 mean my iPhone is permanently bricked?
Not necessarily permanently, but it is a serious error. Many devices showing this error can be recovered through a DFU restore if the NAND is only partially failing. However, if the NAND chip has completely failed, the device may not be recoverable through standard software methods and would require professional microsoldering repair or board replacement to function again.

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