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How to Fix OneKey Pro Firmware Upgrade Error

Updated yesterday

When upgrading the firmware on your OneKey Pro, you may encounter the following error message:

Error Message:

Request failed > Failure_ProcessError, Update file header invalid! : 800

Please follow the steps below to resolve this issue:


Step 1: Download the Latest Bootloader File

Download the latest version of the bootloader file:
👉 Download bootloader file


Step 2: Open the Repair Tool Page

Open the following page in Chrome browser:
👉 Repair tool - emmcFileWrite

  • Connect your OneKey Pro hardware wallet.

  • Select WebUSB as the connection method (see example image below).


Step 3: Write the Bootloader File

  1. Locate the “emmcFileWrite” option on the page and open it.

  2. Choose the bootloader file you downloaded earlier.

  3. Click the “Execute” button and wait until the process is completed.

Once successful, the bootloader repair is finished.


Step 4: Upgrade the Firmware Again

  1. Open the firmware upgrade page in Chrome browser:
    👉 OneKey Pro Firmware Upgrade

  2. Select the latest firmware version on the page and follow the instructions to complete the upgrade.

  3. After the upgrade, your OneKey Pro should work normally.


如在操作过程中遇到任何问题,您可以联系在线客服:https://onekey.so?openMessenger,或发送邮件至 [email protected] 获取帮助。

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